—I’m thinking of losing weight these days.

—Oh, you        be out of your mind. You’re 50 kilograms at the most!

A. will    B. should    C. may    D. must

It is ____ waste of time for young men to devote themselves to playing computer games on ___ Internet only for _____ pleasure.

A. /; the; /     B. the; the; /     C. a; the; a       D. a; the; /

The temperature can fall to －50°C. _____ is, 50°Cbelow freezing point.

A. Which    B. It      C. This     D. That

The river,_________the bank are covered with trees, is very long.

A. whose       B. which   C. of which     D. which of

— Is your mother still a teacher?

— ______.

A. Yes, she was    B. She didn’t use to  C. No, but she used to    D. No, but she used to be

 — Why were you not at the concert last night?

  — I ______ a close game between Seattle Sonnies and Miami Bucks.

 A. watched            B. was watching

 C. have watched        D. had watched

 —Shall I sit at this end of the boat or the other end?

  —If you keep still, you can sit at_________end.

  A. neither   B. each   C. either  D. any

I_________the hobby of fishing as a child.

A. built up       B. set up

C. kept up        D. took up

A computer is so useful a machine ________ we can use everywhere.

 A. that   B. which  C. as  D. what

Mary had promised to give me a ticket for tomorrow. She failed, ____.

A. either    B. though    C. but    D. too