On returning home, she found a note to the door, reading “Call in later”.
| A．attaching |
| B．attached |
| C．attach |
| D．attaches |
Jack, who pretended, heard, however, every word that was said.
| A．not listening | B．not to be listened | C．not to be listening | D．not having listened |
The old man __________ in Tibet for two years as a volunteer teacher；it is an experience he often mentions.
| A．served | B．serves | C．is serving | D．has served |
Qian Xuesen tried many times _________ he found the solution to the puzzle about space technology.
| A．after | B．before | C．since | D．when |
Thosethe exam cheat mustanother exam tomorrow afternoon.
| A．related to; get into | B．absorbed in; get through |
| C．connected with; get over | D．involved in; get through |
He admitteda lie in order to avoid.
| A．having told ;punishing | B．telling ;punished |
| C．to have told ;being punished | D．having told ;being punished |