1The house _____they visited yesterday the one_____the great writer lived many years ago.
A which Which B where where Cwhich where
答案C,解析：这2个空都是考察定语从句,前者是做为visit的宾语,用名词性的,后者作为live的状语用where,相当于in which
2Why not_____?It's quite helpful.
A give his advice Bfollow his advice C take an advice
答案C,解析：follow his advice 是遵从他的建议的意思,根据后面那句这是非常有帮助的可以推测出答案
3Every morning Mr Li takes a _____ walk to his office.
A 20-minutes B 20-minutes C 20-minutes'
答案C
4English is ___useful language in____world.
A an the B a the C the /
答案B,useful的发音是以辅音开头的,冠词用a