--Are you willing to live on Mars one day？
--____________．It sounds exciting，but it still worries me.
A. Of course I am B. Are you joking？
C. Why not？ D. I'm not sure
--Let's buy a gift for our mother.
--Good idea. We should always ________ mother's love for us.
A. explain B. suppose C. wonder D. value
-- Must I leave now?
-- No, you_________. You may still stay here if you like.
A. mustn’t B. can’t C. don’t have to D. won’t
Reading is a wonderful thing. It can take you to places ___ you have never visited.
A. where B. which C. what D. who
--Can I help you?
--Thanks. But I think the box is ______ heavy for you ______ carry.
A. enough; to B. so; that C. too; to D. not, to
Tony gets up early in the morning. He likes to make breakfast ______ his family.
A. at B. on C. for D. from
