In order to find the missing boy, the young couple all they can over the past twenty-four hours.
#101189
A
do
B
did
C
have been doing
D
had done
推荐题目
—How long do you think it is ________ he arrived here? —No more than half a year, I believe.
#104908
A
when
B
that
C
before
D
since
—I'd like a pen which ________ well.—Will this one ________？
#99569
A
writes；do
B
writes；work
C
is written；do
D
is written；work
Climbing Mount Tai great skills and not without risk.
#102025
A
requires; is
B
required; was
C
required; are
D
required; were
Please tell me _____ tomorrow morning.
#104563
A
what are you doing
B
what you are doing
C
what you will be doing
D
what will you be doing
By the end of last month, ten primary schools _________ with the help of Project Hope.
#100770
A
had set up
B
had been set up
C
was set up
D
set up