Mr. Bob, ______ as a manager for many years, found it hard to be an ordinary clerk again.
| A．having worked | B．worked | C．to have worked | D．working |
Her question was so difficult that I could not __________ of it at all.
| A．make up | B．make difference |
| C．make sense | D．make impression |
After staying in hospital for long, the patient was advised to go to the seaside to __________ his health.
| A．take up | B．pick up | C．carry up | D．make up |
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 |