_______ his return from America, he got down to his research.
#92169
A
While
B
In
C
As
D
On
推荐题目
It’s time that I my hair cut. It’s the fifth time that I to the barber’s shop.
#92272
A
had; have gone
B
have; have gone
C
have; went
D
had; go
Don’t forget it’ll be the first time ____ in public
#94859
A
I’ve spoken
B
I shall speak
C
I will speak
D
I speak
-- _________ you called yesterday? -- Tom．Why?
#93721
A
Who it is that
B
Who is it that
C
Who was it that
D
Who it was that
----Do you know our town at all? ----No, this is the first time I ____ here.
#92095
A
have come
B
was
C
came
D
am coming
So far, all of the infected people are thought _______ the flu after direct contact with sick birds.
#92384
A
to have caught
B
having caught
C
to catch
D
being caught