I met a good friend of mine while I on the street.
| A．walks | B．walk | C．was walking | D．am walking |
I was listening to pop songs while my parents ________ dinner yesterday.
| A．were cooking | B．cooked | C．have cooked | D．had cooked |
My little cousin enjoys ________ picture books before he goes to bed.
| A．to read | B．read | C．reads | D．reading |
It was very late, but the teachers were ________ working hard in the office.
| A．almost | B．already | C．still | D．ever |
My teacher said to me with a smile, “Well, you ________ to worry about your lessons.”
| A．needn’t | B．don’t need | C．not need | D．need |
Mr. Wang is always the first one to be in the office ________ he lives far from his company.
| A．although | B．because | C．when | D．as |