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精英家教網 > 高中英語 > 題目詳情

---The window is dirty.
----I know. It ______ for weeks.

A.hasn’t cleanedB.didn’t clean
C.wasn’t cleanedD.hasn’t been cleaned

D

解析試題分析:句子強調對現在造成的影響是好久沒有打掃了,句子要用現在完成時。窗戶是被打掃,所以注意被動形式。句意:窗戶太臟了。我知道。它已經有好幾周沒有被打掃了。故選D.
考點:現在完成時及被動
點評:時態是高考英語的重點,單項選擇中15道有一般都是動詞時態或是語態題。可見它的重要性,所以平時要分清楚16種時態的異同,并輔助以題目進行加強鞏固,對復習階段不懂的一定要多問,并對所積累的知識進行背誦。

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  B. intended for international communication

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   C. Manitoba high schools are famous for the study of space

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In June, 2007, a group of students from eight high schools in Winnipeg, the capital of Canada’s Manitoba province, will begin test-launching (試發射) a satellite the size of a Rubik’s cube.

The one-kilogram Win-Cub satellite, named for its home city and its shape, will be put into low orbit. Once in space, it can perform for a few months or up to several years, communicating information that could help find the signs of earthquakes.

There are 80 similar satellite projects worldwide, but this is the first high-school based program of its kind in Canada. 30 Manitoba high school students are having a hand in designing and building the satellite, in cooperation with aerospace (航空航天的) experts and 10 students from the University of Manitoba, and with support from two other organizations.

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B. intended for international communication

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