I never forget the day _____ we worked together and the day ____ we spent together.A when, which B which, when C what, that D on which; when
______ the day on, the weather got worse.
I’m pleased ______ should be done has already been done.
Do you know our town at all? No, this is the first time I ______ here.
More than one hundred got saved from the fire _____ helicopter.
You didn’t let me drive. If we _____ in turn, you ______ so tired.