【正文】 is missing b. has been missed c. are missing d. was missing than one worker ______ dismissed. a. have been b. are c. has been d. has a student ______ the importance of learning a foreign language. a. have realized b. has realize c. have been realized d. has been realized gas works ______ near the city. a. is b. are c. were d. be surroundings of his house ______ clean now. a. is b. are c. was d. were mittee ______ over the problem among themselves for two hours. a. has argued b. has been arguing c. have argued d. have been arguing public ______ generous in their contributions to the earthquake victims. a. is b. was c. are d. has been ______ on the hillside. a. grazes b. is grazing c. was grazing d. were grazing politics ______ neither conservative nor liberal. a. is b. are c. was d. has been ______ a kind of infectious illness. a. is b. are c. were d. have been Philippines ______ to the southeast of China. a. lies b. lie c. lay d. lays is one of the girls who ______ always on time. a. is b. am c. are d. was is the only one of the stall members who ______ to be promoted. a. is going b. are going c. has been going d. have been going caused the accident ______ on the road. a. were stone b. were stones c. was stone d. was stones and soda ______ his favorite drink. a. is b. are c. were d. have been is to attend our evening. a. both the singer and the dancer b. Either the singer or dancers c. The singer or dancers d. The singer and dancer Smiths ______ their breakfast when the morning post came. a. had b. has been having c. are having d. were having one except two students ______ the meeting. a. has been late for b. have been late for c. was late for d. were later for but him and me ______ to the exhibition. a. am going b. is going c. are going d. was going , as well as prospects, ______ important when one looks for a job. a. are b. were c. is d. was president, acpanied by his assistants, ______. a. have arrived b. are arriving c. had arrived d. has arrived number of cars ______ in front of the park a. is parked b. was parked c. are parked d. has parked number of articles published on smoking ______ amazing. a. is b. are c. were d. have been majority of doctors ______ smoking is harmful to health. a. are believed b. had believed c. has believed d. believe majority of the damage ______ easy to repair. a. is b. are c. were d. be of the crop ______. a. are ruined b. was ruined c. were ruined d. have been ruined of the buildings ______. a. was destroyed b. is destroyed c. were destroyed d. has been destroyed to bed and early to rise ______ a man healthy, happy and wise. a. making b. to make c. make d. makes ______ the language of science. a. is b. has been c. are d. have been young ______ the vital forces in our society. a. is b. has been c. are d. have been man, woman and child ______ some history, enough at least, to survive in the world. a. knows b. know c. is known d. are known of them ______ my friends. a. is b. are c. was d. has been only the whole nation, but the whole Europe , indeed the whole human society ______ to alter its attitude to racial problems. a. need b. needs c. has a need d. have a need to other planets or to the moon _____ many problems. a. involve b. involves c. involving d. to involve that country, the rich ______ richer, the poor, poorer. a. bee b. has bee c. bees d. is being project requires more labor than ______ because it is extremely difficult. a. has been put in b. have been put in c. being put in d. to be put in one in one hundred children exposed to the disease ______ likely to develop it. a. should be b. must be c. is d. are 1 C 19 D 37 D 2 A 20 C 38 A 3 A 21 D 39 B 4 D 22 B 40 C 5 C 23 A 41 D 6 C 24 A 42 D 7 B 25 C 43 C 8 A 26 A 44 A 9 D 27 D 45 B 10 B 28 A 46 B 11 C 29 D 47 B 12 D 30 D 48 A 13 B 31 C 49 A 14 C 32 C 50 C