Question

17. ―How about buying Tim a mobile phone? After all, he isn't a boy any more.

―I think it's necessary, for we sometimes want to make sure if he   home for dinner.

A. will come   B. comes

C. has come    D. would come

Answer 1

17.   A考査動(dòng)詞的時(shí)態(tài)。句意："為蒂姆買一部手機(jī)怎么樣啊？ 畢竟，他不再是一個(gè)小男孩了。""我認(rèn)為有必要，因?yàn)槲覀冇袝r(shí)候想確認(rèn)他是否會(huì)回家吃飯。"從句中所說(shuō)的事在說(shuō)話時(shí)是將要發(fā)生的事，所以用一般將來(lái)時(shí)。這里if引導(dǎo)賓語(yǔ)從句，它引導(dǎo)條件狀語(yǔ)從句不用一般將來(lái)時(shí)。