Many people agree that ___ knowledge of English is a must in ___ internationsl trade today.
| A．a;/ | B．the;an | C．the; the | D．/; the |
A technology company will die soon if it can't __________ to the market fast enough.
| A．reply |
| B．react |
| C．lead |
| D．attend |
We should follow the __________ in a foreign country we are visiting.
| A．habits |
| B．customs |
| C．tradition |
| D．practice |
__________ our earth, or else it will be no longer fit for us to live on.
| A．Protecting |
| B．To protect |
| C．Protect |
| D．Protected |
Don't __________ a trick on the little girl. She is very shy.
| A．take |
| B．have |
| C．give |
| D．play |
__________ your attention focused on practicing, and you can reach your goal of becoming an excellent pianist.
| A．Keep |
| B．Keeping |
| C．To keep |
| D．If you keep |