—Sorry，Mr．Green．I have ________ my homework at home．
—Never mind．But don’t forget next time．
| A．put |
| B．kept |
| C．left |
| D．remained |
The room was dark，_________ I turned on the lights．
| A．and | B．or | C．but | D．so |
----________ have you been studying at school?
----For more than four years．
| A．How often | B．How long | C．How old | D．How far |
My history teacher said that I ________ do better．
| A．can | B．could | C．was | D．was can |
—________did your uncle leave his hometown?
—He ________ for nearly twenty years.
| A．When; has left | B．When; has been away |
| C．How long; has left | D．How long; has been away |
The________ woman_______ Shanghai since her husband______ in 1990．
| A．alone；has gone to：died | B．alone；has left：died |
| C．1onely；has been in；died | D．1onely：has been to：has died |