________ time went by, small clever animals covered the earth and have become the most important animals on the planet.
#31981
A
With
B
As
C
Because
D
During
推荐题目
--- May I go and play with Dick this afternoon, Mum?--- No, you can’t go out _____ your work is being done.
#31631
A
before
B
until
C
as
D
the moment
His father got him a job in a bank but soon it became clear he was not fit for that kind of work．
#32364
A
why
B
what
C
whether
D
that
He never thought that his success came ________ he least wanted it.
#30260
A
until
B
since
C
when
D
while
They were surprised that a child should work out the problem _____ they themselves couldn’t.
#31931
A
when
B
where
C
until
D
while