Only after I had talked to him for quite some time______to understand his worries.
A. do I begin
B. did I begin
C. I begin
D. had I begin
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把所有厂商的收入加总，扣除使用的中间投入品成本来计算GDP的方法是()。
A. 最终产品法
B. 个人收入法
C. 收入法
D. 价值增加法
微观经济学和宏观经济学是互为前提、互相补充的。 ()
A. 正确
B. 错误
After flying across the Atlantic, Charles Lindbergh became famous______.
A. immediately
B. overnight
C. punctually
D. promptly
Why is British society hostile to gypsies？
A. They have more privileges than in many other countries.
B. The British law used to discriminate against them.
C. They do not like the British.
D. They refuse to conform. to British standards.
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