摘要： Not easy as the problem of pollution is , no one should just stop trying. A. to solve B. to be solve C. solving D. being solved
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Not easy as the problem of pollution is____, no one should just stop trying.
A. to solve B. to be solve C. solving D. being solved
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Not easy as the problem of pollution is______, no one should just stop trying.
- A.to solve
- B.to be solve
- C.solving
- D.being solved
Not easy as the problem of pollution is ____, no one should just stop trying.
[ ]
A. to solve
B. to be solved
C. solving
D. being solved
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B. to be solved
C. solving
D. being solved
Not easy as the problem of pollution is____, no one should just stop trying.
A. to solve B. to be solve C. solving D. being solved
查看习题详情和答案>>Not easy as the problem of pollution is____, no one should just stop trying.
| A．to solve | B．to be solve | C．solving | D．being solved |