Next Monday I plan on _ hiking with friends.A go B to go C going D going to 我填B,

问题描述:

Next Monday I plan on _ hiking with friends.A go B to go C going D going to 我填B,

on是介词,除固定表达用do或者to do外,后面都跟doing的形式
Plan to do something 是固定表达,但是在plan后面加了on就破坏了表达形式,不能形成这个表达,所以只能用doing

首先是词组plan on doing sth
其次是因为go hiking是去远足的意思
所以选c

答案C
解析go hiking ...去远足
plan to do...
plan on dong / sth
on 是介词,跟名词,动名词
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plan to do ;plan on doing
一般情况下介词后面不能to do