(2011年濰坊質(zhì)量監(jiān)測(cè))When people cut down big trees,new trees should be planted.________they will have no trees to cut down in the future.

A.If not                           B.If so

C.If no so                        D.If don’t

解析:選A?疾槭÷浴>湟猓寒(dāng)人們砍倒大樹(shù)時(shí),應(yīng)該種植新樹(shù),不然的話,他們以后就沒(méi)有樹(shù)木可砍了。if not如果不,不然;if so如果這樣的話。

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