The headmaster ________for more than two weeks.
| A．has left | B．has gone | C．has been away | D．has come back |
Now many crops can be improved ________different species of plant, such as rice, wheat.
| A．by making |
| B．by crossing |
| C．by converting |
| D．by changing |
________of food ________to the countries struck by the seaquake(海啸)．
| A．Large quantities; is sent |
| B．Large quantities; are sent |
| C．Large numbers; is sent |
| D．Large numbers; are sent |
Each player of chess is trying to trap the other player's king into a position ________escape is impossible.
| A．when |
| B．that |
| C．in which |
| D．from which |
No matter how much you may dislike the adverts, there's no way to ________them in an age of globalization.
| A．miss |
| B．meet |
| C．see |
| D．escape |
All of us still remember the terrible earthquake that ________Tangshan twenty years ago.
| A．attacked |
| B．struck |
| C．knocked |
| D．exploded |