9. “May I take your order now?” “We’d like three black _______ and two green _______.”
A. coffee, cups of teas B. coffees, teas
C. cups of coffee, tea D. cup of coffees, teas
【陷阱】误选C，认为coffee和tea均为不可数名词，不能后加复数词尾-s，从而排除选项A、B、D。
【分析】选B。有的同学认为 coffee 和tea是物质名词，不可数，不能用 three coffees, two teas 这样的表达。其实，coffee既可用作不可数名词，表示“咖啡”这种物质，也可用作可数名词，表示“一杯咖啡”，即在口语中 three coffees 就等于 three cups of coffee。同样，“三杯茶”既可说成 three cups of tea，也可说成 three teas；“三杯啤酒”既可说成 three glasses of beer，也可说成 three beers。
10. _____ is a good form of exercise for both young and old.
A. Walk B. Walking
C. The walk D. To walk
【陷阱】容易误选A或D。
【分析】最佳答案为B。分析如下：
(1) 首先，选项D不如选项B佳，因为，不定式通常表示特定的动作，而动名词才表示习惯性的动作。
(2) 尽管walk用作名词时可以表示“散步”，但它是可数名词，指的是一次一次的具体的散步，而不表示抽象意义或泛指意义的“散步”，要表示此义，要用动名词 walking。比较：
How about going for a walk? 出去散散步如何?
Walking does good to your health. 散步对你的健康有益。
类似地，dance 和 dancing 以及 swim 和 swimming 的区别也是一样：
(1) 名词的 dance表示“跳舞”，是可数名词，指的是一次一次的具体的跳舞，而不表示抽象意义或泛指意义的“跳舞”，要表示后者的意思，要用动名词转化来的名词 dancing。比较：
Let’s have a dance. 我们跳曲舞吧。
He is interested in dancing. 他对跳舞感兴趣。
(2) 名词的 swim表示“游泳”，是可数名词，指的是一次一次的具体的游泳，而不表示抽象意义或泛指意义的“游泳”，要表示后者的意思，要用动名词转化来的名词 swimming。比较：
She had a swim every day. 她每天游一会儿泳。
She loves swimming. 她喜欢游泳。
◆精编陷阱题训练◆
1. Ten years had passed. I found she had _______.
A. a few white hairs B. a little white hair
C. some white hair D. more fifty hair
2.—Hi, this way, please.
—OK.I sometimes have no sense of ______ when I arrive at the crossroad.
A. position B. direction
C. situation D. condition
3. Shelly had prepared carefully for her English examination so that she could be sure of passing it on her first ________.
A. intention B. attempt
C. purpose D. desire
4. I didn’t have to work all weekend — I did it by _______.
A. chance B. choice
C. accident D. myself
5. “Did you get _____ to the party?” “Yes, I replied to it this morning.”
A. an answer B. an invitation
C. a question D. a letter
6. I paid him ￡50 for the painting, but its true ______ must be at least ￡500.
A. price B. money
C. value D. importance
7. His letter was so confusing that I could hardly make any ______ of it.
A. explanation B. meaning
C. sense D. guess
8. You’ve just missed your ______, and you will have to wait for the next round.
A. chance B. turn
C. time D. part
9. —Li Lin is very bright and studies hard as well.
—It’s no ______ he always gets the first place in any examination.
A. question B. doubt
C. problem D. wonder
10. —How can I use this washing machine?
—Well, just refer to the _______.
A. explanations B. expressions
C. introductions D. directions