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2.  當(dāng)他跑回家時(shí)，他意識(shí)到他把鑰匙忘在教室了。

By the time he________  _______ home,he realized he_________the key in the classroom.

1.  當(dāng)我到達(dá)學(xué)校時(shí)，最后的鈴聲已經(jīng)響了。

When I _________ to school, the final bell __________

(       )5. By the time they got there,the big fire________ .

A. had put out                 B. had been put out

C. had put off                D. had been put off

(       )4. She said she_______   there several times.

A. have been                B. have been to

C. had been               D. had been to

(     )3. By the time he got home, his mother had started_______ _ the dinner.

A.cook                     B.cooks

C. cooking                  D. cooked

(    )2. When she got to the shop, she realized she _______________ her purse at home.

A. forgot                 B. had forgotten

C. left                  D. had left

(     )1. _______________ the time I heard the noise, it had already gone.

    A. By     B. At     C. When     D. On

By the end of last year, we__________ (complete)another new gymnasium (體育館).

―Where's your homework, Tom?

―Oh,sorry,I  _______________it at home this morning.

A. left                   B. forgot

C. have left              D. had forgotten

5.  start __________   __________

6.  oversleep_________   _______________