My parents have promised to come to see me before I ____for Africa.
A．have leftB．leaveC．leftD．will leave
A
考查時態(tài).句意:我的父母許諾在我動身去非洲前來看我.可知從句描述的是在某個時間點前完成的動作,故用完成時態(tài),選A.
練習冊系列答案
相關(guān)習題

科目：高中英語 來源：不詳 題型：單選題

Up to now , some less well-off people __________ into the public rental house in Chongqing .
A．movedB．moveC．have movedD．a(chǎn)re moving

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Hello! I ________ you _______ in London. How long have you been here?
A．don’t know, wereB．hadn’t known ,are
C．haven’t known ,areD．didn’t know, were

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Getting to the cinema, quite out of breath, we found the film     for ten minutes.
A．having been onB．had begunC．had been onD．had been started

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

The vase ____easily. Be careful when you handle it.
A．will be brokenB．will breakC．is brokenD．breaks

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

The suggestion they all objected to________to be effective finally.
A．provingB．proveC．had provedD．proved

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

I need to go back home before I _________ money.
A．is running out B．run out C．have run out ofD．is running out of

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Next month various methods __________ to help the patient’s hand get strong.
A．will be appliedB．will applyC．a(chǎn)pplyD．will be applyed

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

E-mail, as well as telephone, ________ an important part in daily communication
A．is playingB．have playedC．a(chǎn)re playingD．play

查看答案和解析>>

同步練習冊答案