When you are confused about some words in reading, you can ______ the dictionary.

  A. have a look at    B. look up   C. check    D. refer to

A survey of the opinions of experts ________ that three hours of outdoor exercise a week ________ good for one’s health.

A. show; are   B. shows; is            C. show; is         D. shows; are

The soldiers have to stand for hours without changing ________.

A. position     B. state            C. situation        D. condition

However, at times this balance in nature is disturbed,         a number of possibly unforeseen effects.

    A. lying in     B. calling in           C. resulting in         D. taking in

—Did you enjoy the drama last night?

   —Yes. I’ve never seen      on before.

    A．the more inspiring   B．a more inspiring

    C．the most inspiring       D．a most inspiring

David gave us a vivid            of his trip to Mount Huangshan after his return.

A. account          B. explanation          C. imagination          D. idea

In developed countries, farm workers _________ only a small section of the population.

A. pick up     B. make up     C. hold up      D. keep up

The lady is crazy _________ the beautiful clothes.

A.  in buying    B.  about buy    C.  about buying    D. to buy

According to the rules，all drivers ________ this traffic accident are to be taken to the police station to make their statements.

A. sensitive to    B. relevant to  C. accessible to    D. due to

Out of the crowded bus      , who was dressed in a black suit and waved to a woman.

A. a tall man in his thirties stepped       B. stepped a tall man in his thirties

C. did a tall man in his thirties step      D. did a tall man step in his thirties