(2013·湖南，26)If nothing________，the oceans will turn into fish deserts.
#99736
A
does
B
had been done
C
will do
D
is done
推荐题目
He_____ articles for our wall-newspaper these years, and he____ about thirty articles.
#101162
A
has written; wrote
B
has been writing; wrote
C
is writing; has been writing
D
has been writing; has written
--Do you know anyone in Paris? --No, I’ll make friends once______ .
#104171
A
I’m settled
B
I have settled
C
I’ll be settled
D
I’m settling
In order to find the missing child, villagers all they can over the past five hours.
#99305
A
did
B
do
C
had done
D
have been doing
I first met Mr Smith in America. He ________ at Stanford University then.
#100993
A
studied
B
had studied
C
is studying
D
was studying
—You were out when I dropped in at your house yesterday.—Oh, I________ for a friend from Beijing at the railway station.
#104690
A
was waiting
B
had waited
C
am waiting
D
have waited