Is this the reason ______ at the meeting for his carelessness in his work?
The cloth _______smooth and soft _______.
Don't doubt the possibility we declared yesterday ____ we will surely win the game in spite of all the difficulties.
The boss of the company is trying to create an easy atmosphere ______ his employees enjoy their work.
_____we understand things has a lot to do with what we feel.
It was so noisy that we _____ hear ourselves speak. A. couldn't B. shouldn't C. mustn’t D needn’t