Question

 (2011年濰坊質量監(jiān)測)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

Answer 1

解析：選A�？疾槭÷浴＞湟猓寒斎藗兛车勾髽鋾r，應該種植新樹，不然的話，他們以后就沒有樹木可砍了。if not如果不，不然；if so如果這樣的話。