问题

They want to develop a kind of dog-friendly food _____ will help dog owners cool down their pets. [ ]

A: who
B: what
C: which
D: whether

正确答案是：

标签： dog , they , want

同类题型

_____ English classes do you have every week?—Five.[ ]

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A：Who（谁）is that girl?B：Oh, is my friend. name is Sally.

I usually ______ books in the morning.