It is in Qingdao ______ you are going to pay a visit to ______ this kind of washing machine is produced.
| A．/; that | B．where; which | C．/; where | D．what; which |
Jack is late again. It isof him to keep others waiting.
| A．typical | B．common | C．ordinary | D．normal |
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 |