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From the photographs ______ from the satellites, scientists are learning things about the earth they have never known before.

A. to sent              B. to be send          C. sending                    D. sent

It is generally accepted that Chinese were the earliest ______ football while the Europeans established the modern rules for football.

     A. played                 B. playing        C. to play             D. having played

 Although the causes of cancer ______, we do not yet have any practical way to prevent it.

     A. are being uncovered                               B. have been uncovering

     C. are uncovering                                       D. have uncovered

Hours of playing violent video games can affect the way the brain works, ______ damage to certain cells of brain and slowing brain activity.

     A. to cause                   B. causing             C. cause                       D. caused

As the visiting prime minister puts, China’s influence in the world will continue to strengthen ______ its economy grows.

     A. although             B. until                C. as                  D. before

Yesterday evening the board had a discussion regarding ______ they should set up more scholarships to meet the increasing demands.

     A. what           B. whether       C. that              D. who

Indeed the best leading actor has read a lot of books, but the best supporting actress has read no ______.

A. more                  B. few            C. less              D. little

--- John, tell me the truth. When did you tell Bill the assignments?

--- The moment he ______ back home.

     A. came                  B. come         C. comes            D. will come

Many introduced plants ______ be cultivated in special soils for some time before they are transplanted in the field, otherwise they won’t survive.

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

Knowing the meaning of a word is one thing; yet using it both grammatically and communicatively properly is quite ______.

A. much               B. many            C. little                D. another