[ Grammar ]
The government has tried to limit the number of private cars _____ the problem of air pollution remains unresolved.
A. when
B. but
C. so
D. if
Select your answer:
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Grammar › View_____ girl standing over there is my sister.
A. This
B. That
C. These
D. Those
Vocabulary and Grammar › View
Therapists are currently using mental imagery in the hope that ________ in the treatment of cancer.
A. it could use helpfully
B. its proof to help
C. it might prove helpful
D. its help to aid