He arrived home late _____the heavy rain. A.since B.because C.because of
The action film has attracted (吸引) millions of young people to the cinema.
Tom _________ Mary in 1998. That is to say, they _________ for 12 years.
---Listen! Is Kate playing the piano in the room? ---No. It _________ be her. She has gone to London with her parents.
--- _________ it is to be a host! --- I agree.
It was _________ difficult work _________ nobody can do it.