It was so noisy that we _____ hear ourselves speak.A. couldn't B. shouldn't C. mustn’t D needn’t
He left here for Beijing in 1998 ,____I have heard nothing from her.
If there were no exams and parents meetings, high school life __ much enjoyable.
—Mary broke up with me! —You____ have forgotten about the Valentine's Day.
---No photos , please. ---_______.
A child, if brought up in ______ large family, is more likely to develop______ ability to share with ________others.