He ____his book ,but he didn't _____it.请问怎么选?

问题描述:

He ____his book ,but he didn't _____it.请问怎么选?
A:looked for ;look for
B:found:;find
C:looked for ;find
D:found;found

C
look for寻找 find发现,找到
译:他找他的书,不过没找到.