下列各句中，没有语病的一句是

Air pollution results in stronger greenhouse effect, which __________ leads to global warming. We must take measures to prevent pollution before it is too late.

Tom insisted what he said ______ true, but we insisted that he _____ and have a look.

My aunt doesn’t like sweet food, so she eatsice-cream.

The girl looked at me with a____expression. Maybe the problem was quite ___.