Question

The teacher asked us ______.

1. A.
   What the bad effect of pollution are
2. B.
   What were the bad effect of pollution
3. C.
   What the bad effect of pollution were

Answer 1

C
：此題重點考查賓語從句的時態(tài)和語序問題，無論哪種句式結(jié)構(gòu)充當(dāng)賓語從句都要用陳述句語序，從句的時態(tài)要和主句的時態(tài)保持一致。因主句的謂語動詞是過去式從句的謂語動詞也要用相應(yīng)的過去時態(tài)。