His sister left home in 1998，and ________ since.
A．had not been heard ofB．has not been heard of
C．had not heard ofD．has not heard of
B
首先觀察四個選項的特點：從語態(tài)來看，兩個選項使用了主動語態(tài)，兩個選項使用了被動語態(tài)，優(yōu)先考慮出題者是否想要考查被動語態(tài)。主語His sister與hear of之間是動賓關系，因此判定此題考查被動語態(tài)。結(jié)合句意“他的妹妹1998年離開家，然后就一直杳無音訊”以及時間標志詞“since”可知，此處應使用現(xiàn)在完成時的被動語態(tài)。
練習冊系列答案
相關習題

科目：高中英語 來源：不詳 題型：單選題

You can certainly leave the classroom as soon as your homework__________.
A．has done
B．has been done
C．will be done
D．will have been done

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

— Why do you do volunteer work in the North-West?
— I___ to improve the lives of the children there through my efforts．
A．was tryingB．have tried
C．a(chǎn)m tryingD．tried

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

(2013·安徽合肥二模)—The cars give off a great deal of waste gas in the streets.
—Yes. But I'm sure something will be done to ________ air pollution.
A．reduce B．remove
C．collect D．warn

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Walmart，which is one of the largest American supermarket chains，________ some of its stores open 24 hours on Mondays through Saturdays.(2012·安徽)
A．keepsB．keepC．have keptD．had kept

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Excuse me.I ________ I was blocking your way.
A．didn't realizeB．don't realize
C．haven't realizedD．wasn't realizing

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

When the sick mother got up, she was surprised to find that her six-year-old daughter _______ in the kitchen.
A．had cookedB．has cookedC．was cookingD．cooked

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

(2013·成都一診)They ________ to go shopping in the downtown district, but they cancelled it because of a hard rain.
A．had intendedB．intended
C．have intendedD．were intending

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Millions of pounds’ worth of damage ______ by a storm which swept across the north of England last night.
A．has been causedB．had been causedC．will be caused D．will have been caused

查看答案和解析>>

同步練習冊答案