By the year 2015, all of China's museums will be free to enter. We_______visit anymuseum without paying.
A. can    b. need    C. must    D. should

— Mom, must I finish my homework now?
— No, you ______. You may have supper first.
A. mustn’t      B. needn’t      C. can’t

--Dad, can I go to the movies tonight?
--Sure, but you ____ come back home before 9 o’clock.

—Can I borrow your dictionary?
—Yes, you _______.
A. Can              B. must                 C. should

—Another cup of tea?
—No,thanks. I_______ be off. Gina is waiting for me.
A. can b. must c. may

As we’re students, we __________ obey the school rules.

You          worry about me. I’m fine.
A. can’t                 B. mustn’t              C. needn’t

—I can’t stop smoking, doctor.   — For your health, I’m afraid you ______.

—Must I go with them tomorrow?
—No, you    .
A. mustn’t     B, shouldn’t   C. needn’t      D. can’t

You ______ wear sports shoes when you climb a mountain.