All reference books ________， he didn't find the key to the question.
#88808
A
being searched
B
searched
C
to be searched
D
were searched
推荐题目
This is the best way they have thought of _____the ______miners.
#97208
A
rescuing;burying
B
to rescue;buried
C
to rescue;burying
D
rescuing;buried
We are so happy to see the problem _______ so quickly.
#91590
A
settled
B
having been settled
C
be settled
D
settling
To learn English well, we should find opportunities to hear English ________ as much as we can.
#89208
A
speak
B
speaking
C
spoken
D
to speak
He hurried to the booking office only ______ that all the tickets had been sold out.
#96020
A
to tell
B
to be told
C
telling
D
told
Once you want to do something, you must get down _____it well. ( )
#89667
A
do
B
doing
C
to do
D
to doing