单项选择题
All that can be done ()
A. have been done B. have done C. has been done D. has done
单项选择题 Mary, along with her parents, () to Paris.
单项选择题 "What's your opinion of our teacher's new painting" "It would seem to me that it's ()his usual standard."
单项选择题 Don't leave your luggage in the corridor. It'll be ()