–Sorry, Professor Smith. I didn’t finish the assignment yesterday. --Oh, you _____ have done it as yesterday was the deadline. A. must B, mustn’t C, should D. shouldn’t
The guests are looking forward every moment to _______ to China again.
Many students don't want themselves to _______ doing _______ homework.
—English has a large vocabulary, _______? —Yes. Know more words and expressions and you will find _______ easier to read and communicate.
Hong Zhanhui never gives up trying. It is the love and responsibility _______ has driven him to go through hardships and survive in life.
Several witnesses gave accounts of what they had seen. It took many hours to _______ the court of the driver's guilt.