问题补充:
I really don’t know .
A. where to travel to
B. how to solve
C. what to do it
D. who to talk to
答案:
A. where to travel to
B. how to solve
C. what to do it
(答案→)D. who to talk to
解析:what、who、that是关联代词,他们本身可以做主语或者宾语;where、how、when是关联副词,做状语,不能做宾语或者主语。做这类题目 要看后面的动词是否是及物动词,或者是否有介词,如果是及物动词或者有介词,那么就是用what、who,如没有就用where、how、when。此题:A.travel to 中有介词to,因此不能和where连用;B.solve是及物动词,不能和副词how连用;C. do是及物动词,但是后面已经有it作宾语了,再用what就重复了;D. talk to中有介词to,who做to的宾语,故选D 正确。