----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
推荐题目
The scientist has made quite a few discoveries, ______ of great importance to the whole world.
#95024
A
which I think they are
B
which I think are
C
I think which are
D
that I think they are
_____ many times, but he still doesn’t know how to operate the machine properly.
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A
Although I have shown him
B
I have shown him
C
Having been shown
D
Having shown
 In the past few years, __________much improvement in the traffic.
#92127
A
there has been
B
there has had
C
there have been
D
there had been