Some English scientists are identifying problems ____ technology in the 21st century. If solved, the solutions could change the world.
#97172
A
facing
B
faced
C
being faced
D
having faced
推荐题目
______with so much trouble, we failed to complete the task on time.
#89246
A
Face
B
Facing
C
Faced
D
To face
I still remember ____ to the Summer Palace and what I saw there.
#95996
A
taking
B
to take
C
to be taken
D
being taken
--- What’s reported in the news?--- The earthquake yesterday is said _______ more than 5 hundred people.
#91641
A
to kill
B
that it is
C
to have killed
D
that it has killed
The man we followed suddenly stopped and looked as if ______ whether he was going in the right direction.
#98470
A
seeing
B
having seen
C
to see
D
to have seen
The 18-storeyed building, when _____, will shut out the sun _____ up the rooms in my house.
#98840
A
completed; lighted
B
completing; lighting
C
completing; lighted
D
completed; lighting