问题补充:
parents say and do had a lifelong effect on their children.
A. That
B. Which
C. What
D. As
答案:
A. That
B. Which
(答案→)C. What
D. As
解析:what引导主语从句,在从句中作say和do的宾语,表示“父母说的话和做的事”。which和what都可以引导宾语从句,并都可以在宾语从句中作主语、宾语、定语或表语,但which指已知中的未知,范围较窄,所指事物比较明确,含有选择的意味。what却指未知,范围较宽,所指事物比较含糊。that引导宾语从句时,在从句只起连接作用不担当任何成分。as用于引导定语从句、原因状语从句、让步状语从句、时间状语从句等。