By the time he was twelve, Edison ________ to make a living by himself .
A．would beginB．has begunC．had begunD．was begun
C
時(shí)態(tài)題。By the time +過(guò)去時(shí)，主句謂語(yǔ)用過(guò)去完成時(shí)態(tài) 選C。 句意：到愛(ài)迪生十二歲時(shí)他已開(kāi)始自己謀生了。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

The UK, which _______ Great Britain and Northern Ireland, is a country famous for its history. 
A．consisted ofB．consisting ofC．consists of D．is consisted of

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

—I’m sorry, I shouldn’t have been so rude to you.
—You        something not very nice to me, but that’s OK.
A．have saidB．had said
C．were sayingD．did say

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Hurry up; it is required that we ______ at six.
A．will arrive B．a(chǎn)rrived
C．a(chǎn)rrive D．would arrive

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Ann ______ here any more．She left last month.
A．won’t workB．doesn’t work C．hasn’t workedD．isn’t working

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

-----What were you up to when she dropped in?
------I______ for a while and _____ some reading.
A．had played ; didB．played; did
C．had played :was going to doD．was playing; was going to do

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

— If it        tomorrow, we’ll stay at home.
— It would be boring.    
A．rainB．rainsC．will rainD．is raining

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

I soon found that the work I was doing ____ by someone else — in other words, I was wasting my time.
A．had already been doneB．has already been done
C．would be doneD．have already been done

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Many a time，the Chinese government urged that American government stop selling advanced weapons to Taiwan，but it__________ listen，__________Sino-US relations.
A．won’t；damaging B．wouldn’t；damaging
C．shouldn’t; to damage D．wouldn’t：to damage

查看答案和解析>>

同步練習(xí)冊(cè)答案