1.___ computers not been used,it would have taken them more
1.___ computers not been used,it would have taken them more time to solve the problem.
a.If have b.Have c.If had d.Had
2.It hasn't been decided whether the equipment ____ at once.
a.should put into use b.must be put into use
c.will e put into use d.be put into use
选d.d
需要2题的解析,其他选项错在哪?
a.If have b.Have c.If had d.Had
2.It hasn't been decided whether the equipment ____ at once.
a.should put into use b.must be put into use
c.will e put into use d.be put into use
选d.d
需要2题的解析,其他选项错在哪?
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