_______ his return from America, he got down to his research.
#92169
A
While
B
In
C
As
D
On
推荐题目
The two sportsmen congratulated each other________winning the match by shaking hands.
#92370
A
with
B
on
C
in
D
to
With the help of the high technology, this year the factory has produced ________ it did last year.
#91907
A
twice as many as
B
twice as many cars as
C
twice as many as cars
D
twice cars as many as
This is the first time I __________ to the capital to attend the celebration ceremony.
#92578
A
came
B
come
C
have come
D
had come
It has been proved _______ eating vegetables in childhood helps to protect you against serious illnesses in later life.
#93434
A
if
B
that
C
what
D
when