Mr. Bellow asked the information clerk _____ he could help him send a letter to New York.
A. if
B. that
C. who
D. where
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A: I made the reservation yesterday.B: What did he say?C: He said that _____.
A. I had made the reservation yesterday
B. he had made the reservation the day before
C. he made the reservation yesterday
D. he made the reservation the day ago
He tried to catch the first bus, but _____.
A. as early as possible
B. in vain
C. as well
D. on request a doctor
C语言中，任意一个程序总是首先执行（）。
A. 主过程
B. 主函数
C. 子程序
D. 主程序
C语言中，定义函数时未给出函数的返回类型，则该函数的缺省返回类型是（）。
A. float
B. int
C. void
D. double
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