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            • 1．

              Dark matter gives out no light and only because of its gravity effect on visible matter ______ see its existence.

              A．does everyone
              B．everyone does
              C．does nobody
              D．nobody does
              难度：难
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            • 2． ________to the extraordinary beauty of Changling is the Ling’en Palace, many of______ decorations made from fragrant type of wood native to China.

               

              A．Added; its
              B．Adding; whose
              C．Added; whose
              D．Adding; its
              难度：难
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            • 3．

               He kept a little notebook, in which        the names and addresses of his friends.

                     A．wrote                  B．writing                C．was written         D．were written

               

              难度：难
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            • 4．

               _________ it rain, the crops would be saved.

                    A．Will                     B．Should                C．Would                 D．Could

               

              难度：难
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            • 5．

               __________ the clouds, you would find the airplane in the sky easily

                     A．Had it not been for                             B．If it were not  

                     C．If it had not been for                          D．Were it not for

               

              难度：难
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            • 6．

               _____, we would go on a picnic．

                     A．The weather is fine                    B．Should the weather be fine

                     C．The weather be fine                   D．Would the weather be fine

               

              难度：难
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            • 7．

               _______ fired, your health care and other benefits will not be immediately cut off.

              A.  Would you be   B. Should you be   C. Could you be     D. Might you be

               

              难度：难
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            • 8．

               _______ Tom, we wouldn’t have been late for the last bus.

              A. If we didn’t wait for           

              B. If we haven’t waited for

              C. we hadn’t waited for        

              D. Had we not waited for

               

              难度：难
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            • 9．

               ______ for the free tickets, I would not have gone to “Avatar” three times.

              A. If it is not          B. were it not      C. Had it not been    D. If they were not

               

              难度：难
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            • 10． There’s no such thing as living alone. Never mind if you’re   (1)   only person in your house and have no dog, no cat, not even fish. You still have got several billion   (2)  (roommate) — and so do we all. Some of them are harmless, some are   (3)  (actual) helpful and some could even kill you. They are, of course, bacteria, fungi(菌类) and viruses, and like it or not, they’re on you, around you, and deeply within you. The fact that bacteria life is everywhere is not   (4)  (surprise). It’s something you    (5)    (learn) from your childhood when your mother told you not to drink water from someone else’s glass. There are lots of bacteria   (6)   are living in your tea kettle. There are bacteria   (7)   (sleep) with you on your bed. Scientists are beginning   (8)     realize) the richness of the microbiome(微生物群系) — which is as complex as the ones   (9)   (find) in oceans, rainforests, deserts and woodlands. Your house has a microbiome and   (10)     do you.
              难度：难
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