A. I can't say it B. I don't know thatC. I'm not sure t……

单项选择题One day Chuck is on a flight ______ the Pacific Ocean suddenly ______ his plane crashed.

单项选择题—Would you like to play basketball with us —Yes, I'd love to. ______ I'm afraid I have no time.

单项选择题— Sorry, I have to ______ now. It's time for class. — OK, I'll call back later.

单项选择题It's impossible for a child to do so much work within a short period of time, ______

单项选择题—What do you think of the concert —I really enjoy it. I didn't expect it was ______ wonderful.

单项选择题—When was the first man with A(H1N1) flu in mainland China known for sure —______ May 11, 2009.

单项选择题One of the boys is ______, all the other boys are ______.

单项选择题The head of the executive branch in New Zealand is______.

单项选择题It is reported that the police will soon ______ the case of two missing children.

单项选择题() Yellow River is the second longest river in our country.

A. /
B. The
C. An
D. A