What do you usually do _____ the evening? —I watch the CCTV9 news, and do some revision work. [ ]

Johan didn’t review(复习)lesson, ________ he couldn’t answer the teacher’s question.[ ]

What kind of movies do you like?　— I like the movies ________are about Chinese history.

_________ are all the gifts?[ ]

If Bob’s wife won’t agree to sign the documents,_________.