Part Ⅱ GRAMMAR AND VOCABULARY
Directions:There are ten sentences in this section.Beneath each sentence there are four words or phrases marked A，B，C and D.Choose one word or phrase that best completes the sentence.Mark your answers on your answer sheet.
41.Our office has recently____to a new computer system.
A.altered B.converted C.transformed D.modified
42.The crowd went____as soon as the singer stepped onto the stage.
A.wild B.emotional C.uncontrolled D.unrestricted
43.Our school library is____closed for repairs.
A.shortly B.quickly C.temporarily D.rapidly
44.His plan is carefully prepared and full of details，so it is a very____one.
A.elaborate B.refined C.ambitious D.complex
45.They’ve lifted a two-year-long economic____on the country.(https://www.daowen.com)
A.enclosure B.restriction C.blockade D.prohibition
46.She must have been pretty____to fall for such an old trick.
A.interested B.gullible C.enthusiastic D.shrewd
47.During the summer vacation，kids are often seen hanging____in the streets.
A.about B.on C.over D.out
48.Because of the economic crisis，industrial output in the region remained____.
A.motionless B.inactive C.stagnant D.immobile
49.His____in gambling has eventually brought about his ruin.
A.indulgence B.habit C.action D.engagement
50.As there was no road，the travelers____up a rocky slope on their way back.
A.ran B.hurried C.scrambled D.crawled