介词后可接that从句吗

有这样一道题：

We were all worried over _______ you were sick.

A. that                         B. which

C. what                        D. the fact that

【分析】答案应选 D，但很容易误选 A 或 B。按英语习惯，除except, but 等极个别介词外，英语介词后通常不能直接跟 that 从句作宾语。遇此情况，通常是在 that 从句前加上 the fact，此时 the fact 用作介词宾语，而其后 that 从句则用作 the fact 的同位语。请看类似试题（答案选均D）：

(1) They knew nothing about ______ he was a thief.

A. that                          B. which

C. what                        D. the fact that

(2) She must face up to _______ she is no longer young.

A. that                          B. which

C. what                        D. the fact that

(3) What he said at the meeting referred to _______ he was interested in the project.

A. that                          B. which

C. what                        D. the fact that

(4) Their belief is proved by the fact that the death penalty prevents murder.

A. that                          B. which

C. what                        D. the fact that

(5) The writer is not satisfied with _______ buses are too crowded.(from www.nmet168.com)

A. that                          B. which

C. what                        D. the fact that