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            • 1． Investigators are working on the assumption that the cell_________ a far bigger attack, involving Paris-style shootings as well as suicide bombings.

               

              A．has been planning
              B．had been planning       

               

              C．is planning
              D．has planned
              难度：难
              解析 收藏 试题篮
            • 2． The little boy ________ in the mud all the morning. No wonder he is dirty from head to foot.
              A．has played
              B．is playing
              C．has been playing
              D．was playing
              难度：中等
              解析 收藏 试题篮
            • 3．

              Sharon is out of a job because of the failure of the project. She _____going back to school, but she hasn’t decided yet.

              A．had considered
              B．has been considering
              C．considered
              D．is going to consider
              难度：较难
              解析 收藏 试题篮
            • 4． —I don't remember having ever seen Mark since last week. Has he gone somewhere?

              — Not really. He_______his newly-bought apartment.

              A．has been decorating
              B．was decorating
              C．has decorated
              D．decorated
              难度：中等
              解析 收藏 试题篮
            • 5． Huawei ______its flagship devices in Europe since 2014, which is a strong indication that the Chinese company is shifting its focus from China to developed markets.
              A．is introducing
              B．is introduced
              C．will be introduced
              D．has been introducing
              难度：易
              解析 收藏 试题篮
            • 6． —How is your project coming along?

                 — I _______ on it. It will be completed in two weeks.

              A．worked
              B．have worked
              C．have been working
              D．had worked
              难度：易
              解析 收藏 试题篮
            • 7． Since the new park was open to the public last week, I _____ a walk there every morning.
              A．have been taking
              B．will have taken
              C．am taking
              D．have taken
              难度：较易
              解析 收藏 试题篮
            • 8． —I have got a headache.

              —No wonder. You      in front of that computer too long.

              A．work
              B．are working
              C．have been working
              D．worked
              难度：易
              解析 收藏 试题篮
            • 9． Traffic conditions in Beijing________ for decades. At first people only complained about jams during rush hours，but today every hour is rush hour.
              A．is worsening
              B．have worsened
              C．have been worsening
              D．worsened
              难度：中等
              解析 收藏 试题篮
            • 10． —Where will you go during this summer holiday?

              —I haven’t decided. I _____  about it since the last one.

              A．have thought
              B．had thought
              C．thought
              D．have been thinking
              难度：较易
              解析 收藏 试题篮
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