Rewrite the sentences with the given words without changing

Giúp với a
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Rewrite the sentences with the given words without changing:

37. It is raining heavily, so I can’t go out.
Because ____

38. Where are the eggs? They were in the fridge. (which)
__

39. We can’t make tea with cold water.
Tea ____

40. The last time I talked to him was 2 months ago.
I haven’t ____