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用所给动词的正确时态和语态完成下面句子
Computer science _______(teach)now almost in all universities and institutes．
In this school English _______(teach)through TV．
Much parking space in cities _______(save)by using small cars．
用所给动词的正确时态和语态完成下列句子
This part of the seabed ________ (explore) many times.
These machines _______(show)at the exhibition last year．