Lily often helps her sister ____her homework.
We will have no water to drink _________ we don’t protect the earth. A. until B. if C. unless
I got an e-mail this morning. It was ________ my pen pal, Tony. A. from B. for C. to
– Would you like some coffee? – No, thanks. I ________ drink coffee. Coffee is bad for my stomach. A. nearly B. usually C. hardly
– What do you want to be when you grow up? – ________ engineer like my father. A. An B. A C. The
– When will you be free, Mr Smith? I want to visit you. – Er, on Saturday or Sunday. ________ day is OK. A. All B. Either C. Both