一Are you willing to live on Mars one day?
一__________. It sounds interesting, but it still worries me.
A. I'm not sure B. Sure, I will C. That's all right D. I hope so
—Are you taller than your cousin, Mike?
—No, I am as ______ as him.
A.tall B.taller C.high D.higher
It is 4:30 pm. Ben and Leon _______ their work, so they are playing chess now.
A. finish B. finished C. have finished D. will finish
When I got into the classroom, Alan________ a book quietly. He didn’t notice me.
A.read B.will read C.was reading D.is reading
一I just saw Peter in the library.
—It _______ be him. He is studying in the classroom.
A. needn't B. mustn't C. shouldn't D. can't
—_______ do you communicate with your foreign friends?
—By writing e-mails.
A. How B. Why C. Where D. When