(2) “When _____ he come?” “I don’t know, but when he _____, I’ll tell you.”
A. does, comes B. will, will come
C. does, will come D. will, comes
答案选 D，第一个 when 疑问副词，用于引出一个特殊疑问句；第二个 when是从属连词，用于引导时间状语从句。
(3) “When he _____ is not known yet.” “But when he ____, he will be warmly welcomed.”
A. comes, comes B. will come, will come
C. comes, will come D. will come, comes
答案选 D，第一个 when 引导的是主语从句，第二个 when引导的是时间状语从句。
8. The bridge, which _____ 1688, needs repairing.
A. is dated from B. was dated from
C. dates from D. dated from
【陷阱】此题容易误选B或D，认为句中用了 1688 这个过去时间，所以应选过去时态，又因为 date from 不用于被动语态，所以只能选D。
【分析】其实此题的最佳答案应是C，因为 date from 的意思是“自某时起存在至今”(＝have existed since)，它通常用于一般现在时，而不用过去时态(尽管其后接的总是表示过去的时间)。如：(www.hxen.com)
The church dates from 1176. 这座教堂是六世纪建的。
The castle dates from the 14th century. 这座城堡是14世纪建的。
但若所谈论的东西现在已不复存在，则可用一般过去时。如：
The church, which dated from the 13th century, was destroyed in an earthquake two years ago. 那座教堂是13世纪建成的，两年前在一次地震中被毁了。
注：与 date from 同义的 date back to 也有类似用法。
9. “You’ve left the light on.” “Oh, so I have. _____ and turn it off.”
A. I’ll go B. I’ve gone
C. I go D. I’m going
【陷阱】容易误选D。
【分析】A和D两者均可表示将来，填入空格处似乎都可以。但实际上只有A是最佳的，因为根据上下文的语境来看，“我去把灯关掉”这一行为是说话人听了对方的话后临时想到的，而不是事先准备的。而按英语习惯：will 和 be going to后接动词原形均可表示意图，但意图有强弱之分，如果是事先考虑过的意图，要用 be going to；如果不是事先考虑过的，而是说话时刻才临时想到的意图，则用 will。比较：
“I’ve come out without any money.” “Never mind, I will lend you some.” “我出来没带钱。”“没关系，我借给你。”(句中用will lend，表示“借”钱给对方是临时想到的，即听了对方的话后临时作出的反应)
I’ve bought a typewriter and I’m going to learn to type. 我买了台打字机，我想学打字。(句中用 be going to learn to type，表示说话人要学打字是事先准备的，并为此买了台打字机)
◆最新原创陷阱题（附详解）◆
1. Look at that little boy wandering about — perhaps he _____ his mother.
A. will lose B. is losing
C. had lost D. has lost
2. It’s good that we _____ to the park because it’s started to rain.
A. don’t go B. hadn’t gone
C. didn’t go D. wasn’t going
3. I _____ for five minutes; why don’t they come?
A. am calling B. called
C. was calling D. have been calling
4. You _____ your turn so you’ll have to wait.
A. will miss B. have missed
C. are missing D. had missed
5. We _____ to move but are still considering where to go to.
A. are deciding B. decided
C. have decided D. had decided