By the time he was twelve, Edison ________ to make a living by himself .
#102887
A
would begin
B
has begun
C
had begun
D
was begun
推荐题目
---Has Tom finished his job yet? ---I have no idea of it; he _____ it this morning.
#103678
A
has been doing
B
had been doing
C
did
D
was doing
I ________ for Beijing next Saturday. Do you know when the earliest plane ________ on Saturday?
#99485
A
am leaving; takes off
B
Leave; takes off
C
leave; is taking off
D
am leaving; is taking off
—Ken, why do you look so tired? —I _______ myself to the climate since I came here.
#101471
A
didn’t adapt
B
haven’t adapted
C
don’t adapt
D
hadn’t adapted
J. K. Rowling ________ writing Harry Potter at a local caf because she could not afford to heat her home.
#99465
A
started
B
starts
C
has started
D
had started
—Did you find the missing couple in the mountain yesterday?—No, but we ________ to get in touch with them ever since.
#104758
A
have tried
B
have been trying
C
had tried
D
had been trying