________ in a heavy traffic jam in a taxi while you are hurrying to the airport is quite an unpleasant experience.
| A．Having caught | B．Being caught |
| C．Caught | D．Having being caught |
Give them a hand this time and I am sure they will offer theirs ______ in the future.
| A．by turns | B．in turn |
| C．at turn | D．in return |
Many policemen and soldiers are ______ the forest _____ the prisoner escaping from prison.
| A．searching for; searching |
| B．searching; searching |
| C．searching; in search of |
| D．in search for; searching for |
Facing the ________situation, the boss of the company looked____
| A．puzzling, puzzled | B．puzzling, puzzling |
| C．puzzled, puzzled | D．puzzled, puzzling |
As we all know, _________ car is becoming _________ popular way of transportation in big cities.
| A．the; a | B．a; / | C．the; / | D．a; the |
—Tom, you are smoking again?
—______? It’s none of your business.
| A．So what | B．How come |
| C．Why not | D．What for |