Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
#92433
A
since
B
after
C
before
D
when
推荐题目
I _____ ten minutes to decide whether I should reject the offer.
#94725
A
gave
B
was given
C
was giving
D
had given
It is the discovery of Cao Cao’s tomb, _____ was made in Anyang, Henan province, ____ has received widespread attention．
#93692
A
where; which
B
where; that
C
that; which
D
which; that
Looking out of the window of my room, ___ a tall tree in the yard.
#93518
A
there was
B
there were
C
I saw
D
there stood
--- Do you know our town well?--- No, this is the first time I _______ here.
#92327
A
come
B
am coming
C
came
D
have come