---- May I smoke here?--- If you      , choose a seat in the smoking section.

(2013·潍坊市高三二模)Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry.

The book ________ be Tom’s. Look! His name is on it.

—Why didn’t you come to Simon’s party last night?—I wanted to, but my mom simply _____ not let me out so late at night.

 —Did you ask Tom for help?—I ________. —I managed perfectly well on my own.