As the world’s population continues to grow, the ___of food becomes more and more of a concern.

 A. worth         B. supply          C. package         D. list

The children, ____ had played the whole day long, were worn out.

A.all of what       B. all of which       C. all of them              D. all of whom

If we leave right away, ____we’ll arrive on time.

A.hopefully        B. curiously          C. occasionally       D. gradually

______how others react to the book you have just read creates an added pleasure.

A.Hearing         B. Hear          C. Having heard           D. To be hearing

Eye doctors recommend that a child’s first eye exam ____at the age of six months old.

A.was             B. be               C. were               D. is

When the group discussion is nearing its end, make sure to ____it with important points.

A.conclude         B. lead              C. avoid              D. hold

During the last three decades, the number of people participating in physical fitness programs ___ sharply.

A.was increasing     B. has increased

C. had increased      D. will be increasing

Half of _____surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.

A.these             B. some            C. ones             D. those

A good listener takes part in the conversation, ____ideas and raising questions to keep the talk flowing.

A.realizing          B. copying

C. offering          D. misunderstanding

The museum will open in the spring with an exhibition and a viewing platform ___visitors can watch the big glasshouses being built.

A.what             B. where             C. when            D. why