What kind of music do Chen Rui like best?—She likes the music _________ is quiet and gentle. [ ]

I hope Jim won’t mind lending you his new digital camera. — He ___________. I have already borrowed one from my cousin, David.

I bought two teddy bears. One is for my sister, ________ is for my friend Tom.

What are you doing _____vacation?[ ]

They were all very tired, but ________ of them would stop to take a rest.