Not until I began to work ______ how much time I had wasted.

A. didn’t I realize                              B. I didn’t realize

C. I realized                                      D. did I realize

 The boys are still playing football happily on the playground ______ it is raining heavily.

A. in case                    B. as if                 C. as long as              D. even though

 All of us are pleased to see the problem ______ so quickly.

A. solve                B. solving             C. solved                    D. to solve

 His father works in a company ______ name always appears in the local newspapers．

A. when                B. whose                     C. where                     D. which

 My parents have always made it clear ______ we shouldn’t judge a book by its cover.

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

 ______ it for years, researchers now tend to believe drinks with sugar are linked to 180,000 deaths worldwide.

A. Studying                                      B. Having studied

C. Being studied                              D. Having been studied

 ―Have they got their new house painted yet?

―I don’t know. But I was told it ______ when I met them last week.

A. had been painting                       B. would be painting

C. was painted                                        D. was being painted

 ―What does the sign over there say?

―No student ______ bring drinks into the computer room.

A. will                   B. may                 C. shall                D. must

 ―Can I help you?

―I would like to buy a gift for my mother, ______ at a proper price but of great use.

A. that                  B. one                  C. it                      D. which

 ―Say, Jane, will you come with me to the game this Friday?

―______, Bob, but I promised Mary I’d go with her.

A. Thanks            B. My pleasure     C. Take it easy           D. Forget it