__ It is so late. Our son __________ be back . __ Don’t worry . I dare say he ________ have some extra work to do.
______this difficulty is overcome, other problems will be easy to solve.
Don’t mention that at the beginning of the story, or it may ____the shocking ending.
---How long ____ you ____ in Singapore? ---For just the weekend. I’ll be back next Monday morning.
Rather than ______ on a crowded bus, he always prefers _____a bicycle.
The man ______ was a friend of mine.