A. having beenB. only to beC. always beingD. unfortunat……

单项选择题All（）has already been done.

A. can be done
B. should be done
C. that can be clone
D. what should be done

单项选择题Neither he nor I（）from Canada. We are from Australia.

A. is
B. are
C. am
D. be

单项选择题It is chairman of the department ______ the teaching staff elected him.

单项选择题I prefer ______ there doing nothing.

单项选择题It is foolish ______ such a mistake.

单项选择题No sooner had we reached the top of the mountain ______ we all sat down to rest.

单项选择题Neither Mary nor her brother ______ good at singing.

单项选择题I don't think it advisable ______.

单项选择题—______ —Yes, a bit cold, though.

单项选择题—So you missed the meeting. —______. I got there five minutes before it finished.