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用所给动词的正确时态和语态完成下面句子
Most of the waste metal can _______(put)to use again．
用所给动词的正确时态和语态完成下列句子
Most of the waste metal can ________ (put) to use again.
请用所给动词的适当时态填空。
What ________ you two ________(talk)about?I can't make head or tail of it．
In this school English _______(teach)through TV．
Computer science _______(teach)now almost in all universities and institutes．