Some people can never go above 4,000 meters because their body is unable to ______ to these extreme conditions.
| A．adopt | B．adjust | C．addict | D．access |
__ with such great difficulty, Jack felt at a loss ___.
| A．Facing; what to say | B．Faced; what to say |
| C．Having faced; how to tell | D．Being faced; how to speak |
—Sir, I’d like to take a week’s holiday.
—____. We’ re too busy now.
| A．Forget it | B．Don’ t mention it | C．Don’t worry | D．Pardon me |
—He looks very happy. He ____have passed the exam,
—I guess so. It’s not difficult after all.
| A．should | B．could | C．must | D．might |
Nowadays, most people，in order to keep fit，prefer walking to driving ____necessary.
| A．if | B．unless | C．in case | D．as if |
Giving children pocket money as a gift during the Spring Festival is a common ____ in China.
| A．sense | B．practice | C．deed | D．habit |