1.B we'd like to do_____we can (do) _____the poor.
这句话中can后习惯把do省略,为了避免重复.第一个空可以选all,这时we can (do)是省略了引导词that 的定语从句;也可以选whatever引导宾语从句,whatever we can (do)做前面动词do 的宾语.第二空必须选 不定式to help来充当目的状语.
表示尽sb所能来做sth,可用以下结构:
do all/everything (that) sb can to do sth
do what/ whatever sb can to do sth
do as much as sb can to do sth
try one's best to do sth
2.A be angry at sb/sth"对sb/sth生气" 题目中at 后面已经给有宾语all了,he was doing是做定语,所以选that引导定语从句;第二空是so...that...结构“如此...以至于...”
3.D wether引导同位语从句,表示“是否”