Unlike watching TV, reading is a highly active process _____ it requires attention as well as memory and imagination.

A. until        B. bit            C. unless          D. for

When he was retired and went back home in _____, he was already in______.

A. the fifties; his sixty              B. fifties; his sixties

C. the fifties; his sixties            D. fifty; sixty

---He ought to have been warned of the danger.

---_______but he wouldn’t listen to me.

A. He did       B. He should      C. He ought to     D. He was

 ---Would you like to have a cigarette?

---No, thanks. It is three years since I _______.

A. have begun to smoke           B. smoked

C. began to not smoke             D. had smoked

I tried to get through to her, but she simply ___ not turn on her cellphone as she was busy.

A. could        B. might        C. would           D. should

Li Rong told me what difficulty she had have_____ English before she came to Canada.

A. learning      B. learn         C. learnt           D. to learn

Among almost seven hundred kinds of bamboo, some fully grow___ a foot, while others can grow three feet.

A. as high as    B. higher than    C. no higher than    D. so high as

I’m sorry, but I can’t go with you to the cinema because I have to ___my sick brother.

A. refer to          B. attend to       C. lead to           D. stick to

---Got your driving license?

---No, I ___too busy to have enough practice, so I didn’t take the driving test last week.

A. was            B. am            C. have been        D. had been

I can’t find my key. It ___________ in my office.

A. can be forgotten                        B. can be left

C. must have been forgotten           D. must have been left