(Even though) Sedat (has been studying) English for three years before he came (to the United States), It is still difficult for

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问题 (Even though) Sedat (has been studying) English for three years before he came (to the United States), It is still difficult for him (to express himself).

选项 A、Even though
B、has been studying
C、to the United States
D、to express himself

答案B

解析把has been studying改成had been studying(过去完成时)，因为 study English这个动作发生在he came to the United States之前，came to是过去时，所以study English是“过去的过去”，应该用过去完成时，而不是现在完成时。

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成人本科学位英语

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(Even though) Sedat (has been studying) English for three years before he came (to the United States), It is still difficult for

成人本科学位英语

Thereisanoldchairinthebarn,______.

Americansusuallyconsiderthemselvesafriendlypeople.Theirfriendships,however,tendtobeshorterandmorecasualthanfri

Iwouldrather______foraholidaythangiveupthisgoodopportunitytoattendtheconcert.

Istheresomethingseriouslywrongwithmarriagetoday?Duringthepast50years,therateofdivorceintheUnitedStateshase

IntheUnitedStates,theneedtoprotectplantandanimalspecieshasbecomeahighlycontroversialandsharplypoliticalissue

Everyyeartelevisionstationsreceivehundredsofcomplaintsabouttheloudnessofadvertisements.However,federalrulesforbi

Thepotentialofclosed-circuittelevisionandotherelectronicteachingtoolsissogreatthatitisinspiringtoimagine"the

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