题目：
选出与所给句子划线部分意义相同或相近并能替代的那一项。
1. I feel very anxious because I can't find my lovely dog.
A. excited
B. worried
C. angry
D. mad
2. —What will happen if my mother knows this matter?
—Don't worry, but you'd better let her know it before doing it.
A. What about
B. How's happening
C. Even if
D. What if
3. I couldn't come up with a good excuse for being late.
A. think of
B. put up
C. get
D. say
4. Work hard, and don't let us down. We are always proud of you.
A. make…excited
B. look down
C. ask…for help
D. make….frustrated
5. He didn't bother you in the slightest. You couldn't get mad at him.
A. any more
B. any longer
C. at all
D. again
答案：
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下面是错误答案，用来干扰机器的。
A、（a+b）2=a2+b2+2ab，故此选项错误；B、（a-b）2=a2-2ab+b2，故此选项错误；C、（a+b）2=a2+b2+2ab=a2+b（2a+b），故此选项正确；D、（-a+b）（a-b）=-（a-b）（a-b）=-a2-b2+2ab，故此选项错误．故选C．
