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What the public is          about is whether medical workers and scientists will be able to find a cure for the new disease in a short time.

A. concerning                 B. concern              C. concerned        D. to concern

 The second book ________ I want to read is Business at the Speed of Thought.

A. which                             B. that                                 C. what                       D. As

 You’d better          your score and see if you have passed the exam.

A. add up to                   B. add to                         C. add up              D. Add

 The scientists have made _______ possible for us to communicate with each other more easily.

A. it                                     B. that                               C. this                       D. them

 —May I ask a question after class，Sir?

—        , but not during my lunch break.

A. I am sorry                     B. Anytime          C. Go ahead   D. Certainly

 As soon as she saw her boyfriend, she ________ crying.

A. burst into                       B. broke out                         C. burst out               D．broke in

 He wouldn’t leave the TV set, ______ he was going to have an important exam the next day.

A. even so                           B. even if                              C. as though             D. as if   

 —What ________ an important part in their lives?

 —Friends.

A. plays                               B. takes              C. makes                  D. Acts

 It was in 1969 ______ two Americans went to the moon by spaceship.

A. that                            B. before                       C. when                D. Since

 Even on a cold day，he prefers ________out to play football ________ at home.

A. going；rather stay                              B. going；to staying

C. to go；rather than staying                       D. to go；rather than to stay