You should try your best ____ your English.
| A．to improve | B．improving | C．improves | D．improve |
____ it was late, the students were still studying in the classroom.
| A．Although | B．But | C．As long as | D．Because of |
---____do you take exercise? ---Every day.
| A．How long | B．How far | C．How many | D．How often |
Jack works ___. He____ plays computer games after school.
| A．hard, hard | B．hardly, hardly | C．hard, hardly | D．hardly, hard |
Mary has a toothache(牙痛).She has to_______.
| A．go online | B．use the Internet | C．go to the dentist | D．watch a game show |
Tara is quite ____ from Tina. There are many ____ between them.
| A．different. different | B．different, differences | C．differences, different | D．differences, different |