—Is it necessary to look up every new word when I come across it in reading?
—No. You ________， because you are likely to guess the meaning from the context.
| A．can't | B．mustn't |
| C．don't have to | D．ought not to |
I was walking down the street, when I suddenly saw a car __________ a huge pine.
| A．bump into | B．bump up |
| C．bumped into | D．bumped up |
I soon found that the work I was doing had already been done by someone else —__________ I was wasting time.
| A．as a result | B．in the meantime |
| C．in other words | D．for one thing |
__________ with foreign countries can bring us much information about the world.
| A．Contrast | B．Competition | C．Contact | D．Combination |
—Have you known Dr. Jackson for a long time?
—Yes, since she________ the Chinese Society.
| A．has joined | B．joins | C．had joined | D．joined |
You may depend on __________ that they will be there on time.
| A．this | B．that | C．it | D．/ |