区域经济一体化在消除贸易壁垒方面与贸易自由化是一致的。
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关税同盟在发达国家比在欠发达国家更容易取得成功。
A. 对
B. 错
It worried her a bit ________her hair was turning gray.
A. while
B. that
C. if
D. which
________you don’t like him is none of my business.
A. What
B. How
C. That
D. Which
_______ we can’t get seems better than _______we have.
A. What; what
B. Why; what
C. How; how
D. Why;why
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