It is said that _______________of confirmed cases(确诊病例) in Beijing _______________over 300 during the past days.
A.the number; has reached B.a number; has reached
C.the number; have reached D.a number; have reached
—Must I return the book to you now?
—_______________, you _______________. You can do it tomorrow.
A.No; needn’t B.No; mustn’t C.Yes; must D.Yes; may
—It is so hot today. Why not swim in the river?
—No, we can't swim in the river. Our teachers and parents always warn us _______________ in the river.
A.to not swim B.swimming C.not to swim D.not swimming
—Jack, I'm busy doing the washing. Can you give me a hand?
—Wait a moment. I ____________________ the bed.
A.am making B.will make C.was making D.have made
—To be honest, the job is done _______________ to make your boss pleased.
—I’m sorry. I will try my best next time.
A.too careless B.careless enough C.too carelessly D.carelessly enough
—_______________ I have tried many times, I can't work it out.
—Don't give up and let's have another try together.
A.Since B.Because C.Unless D.Though
