It __________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
Do you think shopping online will ________take the place of shopping in stores ?
----Did you see the film ______ was shown last night? --- Yeah, it was really wonderful.
He was in the mountain for a year. He felt as if he was ________ from the outside world.
You should book a train ticket_____ if you want to go home in time before the Spring Festival.
Finding information in today’s world is easy. The ______ is how you can tell if the information you get is useful or not.