Question

Not easy as the problem of pollution is______, no one should just stop trying.

1. A.
   to solve
2. B.
   to be solve
3. C.
   solving
4. D.
   being solved

Answer 1

A
考查固定結(jié)構(gòu)。Not easy as the problem of pollution is____,是as引導(dǎo)的讓步狀語從句，是一個(gè)倒裝句，正常語序應(yīng)是as the problem of pollution is not easy____結(jié)構(gòu)，考查做某事不容易結(jié)構(gòu)，即be not easy to do 結(jié)構(gòu)，所以選A。