—What do you think of the news in today's newspaper?
—We shouldn't ________ the trouble of helping others only because what we do may invite trouble.
| A．knock off | B．take off |
| C．keep off | D．break off |
More and more people are signing up for Yoga classes nowadays, ____ advantage of the health and relaxation benefits.
| A．taking |
| B．taken |
| C．having taken |
| D．having been taken |
With a lot of difficult problems _______, the newly-elected president is having a hard time.
| A．settled |
| B．settling |
| C．to settle |
| D．being settled |
It was unbelievable that the fans waited outside the gym for three hours just ____ a look at the sports stars.
| A．had |
| B．having |
| C．to have |
| D．have |
____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
| A．Put |
| B．Putting |
| C．Having put |
| D．Being put |
_____ to sunlight for too much time will do harm to one's skin.
| A．Exposed |
| B．Having exposed |
| C．Being exposed |
| D．After being exposed |