Linda worked for the Minnesota Manufacturing and Mining Company, ____ as 3M.

A. knowing                  B. known        C. being known              D. to be known

If you are feeling so tired, perhaps a little sleep would _____.

A. act       B. help         C. serve        D. last

_____ modeling business is by no means easy to get into, the good model will always be in demand.

A. While           B. Since               C. As                  D. If

I’ve never seen anyone run so fast---- ______ David go.

A. just watch      B. just to watch        C. just watching     D.just having watched

We had three sets of garden tools and we seemed to have no use for ______.

A. none        B. either       C. any        D. each

Because the shop _____, all the T-shirts are sold at half price.

A. has closed down               B. closed down

C. is closing down                D. had closed down

I had to buy _________ these books because I didn’t know which one was the best.

A. both              B. none              C. neither         D. all

According to a recent U.S. survey, children spent up to 25 hours a week _________ TV.

A. to watch       B. to watching            C. watching          D. watch

Children under 12 years of age in that country ________ be under adult supervision when is a public library.

A. must         B. may      C. can       D. need

The first use of atomic weapons was in 1945. and their power ______ increased enormously eversince.

A. is        B. was      C. has been      D. had been