下列各句中，加线的成语使用不恰当的一项是（     ）

When you don’t know a word, you can _________ in the dictionary

______ do you like, the red one or the blue one

Sam is a little weak in English and he has _______________ what the teacher says in class.

people would like to find an apartment near the university, there are very few ________ apartments in this area.