After ________in the research for so many years，the scientist succeeded in finding the result at last.
#93113
A
buried
B
being buried
C
having buried
D
having been buried
推荐题目
Our waste recycling project ________ a lot of investigation and paperwork had been done by the end of last term.
#88785
A
involved
B
to involve
C
being involved
D
involving
Some of the suspects________refused to answer and kept their mouths shut.
#98148
A
questioning
B
being questioned
C
questioned
D
to be questioned
The Arctic is considered _____ the northern part of the Atlantic.
#98292
A
having been
B
to have been
C
to be
D
being
—Henry doesn’t seem like the same person.—_________so much in the war has made him more thoughtful.
#98221
A
For him to see
B
His seeing
C
Having seen
D
To be seeing
On ______ the flight would be delayed, we made other arrangements.
#97918
A
being informed
B
informed
C
informing
D
having informed