what與that引導名詞性從句時有何區別？ 請看題：
—I think __________ he needs is more practice.
—Yes. __________ he needs more practice is clear.
A. what， What B. that， That C. what， That D. that， What
此題應選 C。其餘三項均可能被誤選。what 和 that 都可以引導名詞性從句，但有區別。如：
1. what 引導名詞從句時，它在從句中要充當句子成分(主語、賓語等)，而 that 引導名詞從句時，它在從句中不能充當句子成分。
2. what 引導名詞從句時，它有詞義(表示：什麼；所……的[東西])；而 that 引導名詞從句時，它沒有詞義。
請做以下試題，注意區別 what 和 that。如：
1. ________ you said is different from the thing ________he told us.
A. What， what B. That， that
C. What， that D. That， what
2. —I think ________ he said is true.()
—But don’t forget the fact ________he is a cheat.
A. what， what B. that， that
C. what， that D. that， what
3. ________ surprised us most is ________he spoke English so well.
A. What， what B. That， that
C. What， that D. That， what
答案：1. C 2. C 3. C
