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            • 1．
              When you have any questions，please ______ the teacher for help．（　　）
              A．tell
              B．asking
              C．ask
              D．telling
              难度：易
              解析 收藏 试题篮
            • 2．
              ______ eat too much hamburgers． They are unhealthy food．（　　）
              A．Not
              B．Isn"t
              C．Don"t
              D．Doesn"t
              难度：较易
              解析 收藏 试题篮
            • 3．
              ______ （ not smoke ） here，Rick．Smoking is not allowed in public places．
              难度：较易
              解析 收藏 试题篮
            • 4．
              ________ some beef，one cabbage，four carrots for the party．（　　）
              A．Drink
              B．Buy
              C．Pour
              D．Peel
              难度：较易
              解析 收藏 试题篮
            • 5．
              ______ the seeds and they will grow．（　　）
              A．Water
              B．To water
              C．Watering
              D．Watered
              难度：较易
              解析 收藏 试题篮
            • 6．
              To test eggs，______ them in a bowl of water：if they float they"re bad，if they sink they"re good．（　　）
              A．put
              B．putting
              C．to put
              D．to be putting
              难度：较易
              解析 收藏 试题篮
            • 7．
              Don"t ______ at others．It"s impolite．（　　）
              A．to laugh
              B．laugh
              C．laughing
              D．laughed
              难度：较易
              解析 收藏 试题篮
            • 8．

              你的房间现在一团糟。请打扫一下。

              Your room is now ________ ________. Please ________ it ________.

              难度：中等
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            • 9．

              throw away, healthy, in this way, try one's best to, take part in, hope, possible, be good for, use, waste
              (1) New studies say that eating chocolate may ________________________ your heart.
              (2) Please sort out (挑选出) what you want and ________________________ the rest.
              (3) He still works very hard although he feels ________________________ these days.
              (4) We should collect the waste paper because we can ________________________ it.
              (5) The future doesn't seem very ________________________ because he is too lazy.
              (6) Only ________________________ can we win the game.
              (7) A good teacher never fails to ________________________ answer his students' questions.
              (8) She will go home to ________________________ the Thanksgiving dinner this weekend.
              (9) It is almost ________________________ for him to finish this work in such a short time.
              (10) It is ________________________ to throw away the empty bottles.
              难度：中等
              解析 收藏 试题篮
            • 10．
                     touch anything without your teacher in the lab．（　　）
              A．Can"t
              B．Not
              C．Don"t
              D．No
              难度：较易
              解析 收藏 试题篮
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