Julia _____ with a stranger when Jim went to the jacket he _____ in the restaurant．
| A．had quarreled; left | B．had quarreled; had left |
| C．was quarreling; has left | D．was quarreling; had left |
In summer people usually stay up late outside, ______ the cool air.
| A．enjoy | B．enjoying | C．to enjoy | D．enjoyed |
The foreiger knows little about ______ is called "Hope Project" in China.
| A．what | B．that | C．which | D．it |
He was born ____ a very cold night _____ December.
| A．in; in | B．In; of | C．on; in | D．on; of |
When he knocked at the door, my mother was busy ____ supper.
| A．preparing for | B．in preparing |
| C．to prepare for | D．to prepare |
He waited until it was dark ____ nobody could see him clearly.
| A．so that | B．in order to | C．although | D．however |