You won’t feel happy at school ______ you get on well with your classmates.

     A. though       B. when         C. unless        D. because

—I called you at 4:00 yesterday afternoon, but no one answered.

        —Sorry, I ______ with my friends at that time.

     A. swim        B. swam         C. will swim      D. was swimming

_______ you wait a few more minutes? It’ll be your turn soon.

     A. Must        B. Should       C. Could        D. Might

—Mom, can I leave my homework for tomorrow?

        —I’m afraid not. Don’t _________ what you can do today till tomorrow.

     A. put on       B. put down      C. put up         D. put off

—Mr Hu, can you tell us how to learn math well?

       —Sure. But remember nothing can be learned _________ hard work.

     A. by          B. at            C. without       D. for

—What do you think of the dress?

        —Wonderful. I don’t think I can find a _________ one.

     A. good        B. better         C. bad          D. worst

Soft drinks _______ to children for free in some restaurants on Children’s Day.

  A. offer                         B. have offered

      C. are offered                    D. will be offered

—Why are you so excited?

       —Peter invited me _______ on a trip to Yuntai Mountain.

     A. to go        B. go           C. going        D. went

Tony, tell me the result of the discussion ______ you had with your dad yesterday.

     A. what         B. which         C. when         D. who

—Excuse me, where is Mr Brown’s office?

        —Sorry, I don’t know. I ______ here for only a few days.

     A. work         B. worked        C. have worked   D. will work