Question

There is a new problem involved in the popularity of private cars __________ road conditions require __________.

A．that ... improving	B．which...to be improved
C．where ...improving	D．when...improving

Answer 1

A

考查同位語從句和固定搭配。involved in the popularity of private cars是problem的后置定語，__________ road conditions require __________是problem的同位語從句，講的是problem的具體內(nèi)容，且同位語從句意完整，用that引導(dǎo)；某事需要被做，可以用require to do或require to be done 結(jié)構(gòu)。所以選A。