17题:"would buy"表示将来打算买这所学校,“had bought"表示已经买下这所学校.句子中”he"指 “the new boy"所以用”would buy"更恰当些.
22题:“which”指某件事或某件物,"who"指某人.所以“which"更恰当.
24:"what"在从句中做谓语"would do"的宾语,如果选"if"或"wether"从句就将缺少宾语,因为"if"或"wether"不充当某个句子成分.
17题:"would buy"表示将来打算买这所学校,“had bought"表示已经买下这所学校.句子中”he"指 “the new boy"所以用”would buy"更恰当些.
22题:“which”指某件事或某件物,"who"指某人.所以“which"更恰当.
24:"what"在从句中做谓语"would do"的宾语,如果选"if"或"wether"从句就将缺少宾语,因为"if"或"wether"不充当某个句子成分.