Selecting a mobile phone for personal use is not an easy task because technolog
题型：不详难度：来源：
Selecting a mobile phone for personal use is not an easy task because technology ________ so rapidly.| A．is changing | B．has changed | | C．will have changed | D．will change |
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答案
| A |
解析
本句的主句一般现在时表达的是目前的情况，而“科技发展迅速”也是现阶段正存在的一种状态，不是在过去，也不是在将来，因此只能用现在进行时表达。 |
举一反三
All the preparations for the task ________，and we"re ready to start.| A．completed | B．complete | | C．had been completed | D．have been completed |
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(2013·泰安一中阶段测试) —Do you think he can get first prize in jumping?
—Impossible now. He ________ to do so，but he has just hurt his leg.| A．would expect | B．was expected | | C．has expected | D．is expected |
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Mr. Smith ________ his pupils how to prepare for the test since 8 am, but no one listens to him.| A．has told | B．is telling | | C．has been telling | D．will have told |
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—Would you mind if I borrowed your car just over the weekend?
—I"m sorry, but it"s just not possible, because I ________ my mother this weekend.| A．am visiting | B．have visited | | C．was visiting | D．visited |
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Lucy ________ guitar lessons every three weeks in the past three years, but now she is considering she"ll make it every other week.| A．is having | B．had had | | C．had | D．has been having |
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