Mike didn’t go to bed he finished his homework last night.
| A．after | B．until |
| C．because | D．while |
Miss Liu can sing a lot of English songs and she can sing them ___ .
| A．good | B．happy | C．well | D．bad |
Only one of the answers _______ right .Either he or I________ right.
| A．are; am | B．is; am |
| C．are ;are | D．am; are |
---- How do you usually go to school, Mary?
----I usually go to school _______ a bus.
| A．take | B．by | C．on | D．with |
Don’t leave the baby at home _____. It’s very _____.
| A．lonely; dangerous | B．alone; danger |
| C．lonely; danger | D．alone; dangerous |
This is______difficult problem that few students can work it out.
| A．so | B．so a | C．such | D．such a |