—It’s time _____ lunch.—OK. Let’s _____.
—Be quiet, Mr Smith is coming. —Don’t worry. It ___ be him. Mr Smith is much taller. A. mustn’t B. must C. can’t
Be quick, ___we’ll be late for school. A. and B. or C. so
Susan joined an art club at ___age of six and paints well. A. the B. an C.a
—Can you speak English, Mr Wang? —Yes, but only___ A. little B. a little C. a lot
—How often do you exercise? —___ A. Two B. Twice C. Second