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.