Not easy as the problem of pollution is____, no one should just stop trying.
#96406
A
to solve
B
to be solve
C
solving
D
being solved
推荐题目
___________ that the government can lead them out of the financial crisis, people are optimistic about the future of the country.
#99013
A
Convincing
B
Convinced
C
To convince
D
Having convinced
Square dancing ________ to help maintain fitness has caused conflicts between the Damas and the neighboring residents.
#88549
A
claiming
B
claimed
C
having claimed
D
to claim
In zones where earthquakes are known to occur, ______ construction techniques can significantly reduce the effects of seismic wave.
#94980
A
to improve
B
improving
C
improved
D
being improving
_______ advantages and disadvantages, Mr. Smith decided to leave the company and go to the west to try his fortune.
#96955
A
Having compared
B
Having balanced
C
Having observed
D
Having examined