We must _____(wear) enough clothes ______(keep) us warm.

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Wemust_____(wear)enoughclothes______(keep)uswarm.Wemust_____(wear)enoughclothes______(keep)uswarm.We

We must _____(wear) enough clothes ______(keep) us warm.
We must _____(wear) enough clothes ______(keep) us warm.

We must _____(wear) enough clothes ______(keep) us warm.
wear to keep
第一个因为must是情态动词,所以不加to
第二个wear 和keep 两个动词之间要用不定式加to