22．It is__________comfort for _____ patients to be close to their loved ones.
| A．a, the | B．/; the | C．a, / | D．the, the |
Some people try to knock me down, only ________ me more determined to do things better.
| A．having made | B．make |
| C．to make | D．making |
________ in the bank robbery, Tod was arrested by the local police early in the morning.
| A．Involving | B．Involved |
| C．To involve | D．To be involved |
________ all the homework assigned by the school, the students have to work at it till midnight.
| A．Completing | B．To complete |
| C．Having completed | D．To have completed |
________ in the countryside made Mr. Wilson very hardworking when he was very young.
| A．Bringing up | B．Having brought up |
| C．Being brought up | D．Brought up |
—The cars give off a great deal of waste gas in the streets.
—Yes. But I'm sure something will be done to ________ air pollution.
| A．reduce | B．remove |
| C．collect | D．warn |