— 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

单项选择题小学英语课堂唱英语歌，应要求______。

单项选择题班集体形成的条件和前进的动力是______。

单项选择题主张把课程的重点放在现实社会问题及学生关心的社会问题上的理论是( )。