—Have you been to the Great Wall?

     —Perhaps not in my memory. ________, it might have been during my early childhood.

     A. If any    B. If so     C. If ever     D. If not

 The question that puzzled them is ____ they can get rid of the air pollution in the area.

     A. how is it that    B. that how     C. what is it      D. how it is that

 Teachers have to constantly update their knowledge in order to maintain their professional _____.

     A. consequence     B. independence     C. competence     D. intelligence

 “I don’t think it’s my _______ that the TV blew up. I just turned it on. That’s all.” said the boy.

     A. error     B. mistake     C. fault     D. duty

 —Hi, Monica. Have you made up your mind yet?

     —Well, _______. I think I’m going to take up hairdressing.

     A. sooner or later     B. more or less     C. better or worse    D. now and then

 —Look! Somebody _____ the sofa.

     —Well, it wasn’t me. I didn’t do it.

     A. is cleaning    B. was cleaning    C. has cleaned    D. had cleaned

 The manager is said to have arrived back from Paris where he ____ some European business partners.

     A. would meet     B. is meeting   C. meets    D. had met

 —Mummy, can I put the peaches in the cupboard?

     —No, dear. They don’t ____ fresh. Put them in the fridge instead.

     A. keep   B. fit   C. get   D. last

 The success of a government should be measured ____ the health and happiness of the people as well as the development of the economy.

     A. in face of    B. in place of    C. in terms of   D. in line with

 According to scientists, our mental abilities begin to____ from the age of 27 after reaching the highest level at 22

     A. differ    B. shrink    C. fail    D. decline