-----The windows must have taken you quite a long time that day.
------Right. They for weeks.
| A．haven’t been cleaned | B．hadn’t been cleaned | C．didn’t clean | D．haven’t cleaned |
Many teachers were impressed by Kris's ________ attitude to life because he never gave up.
| A．positive | B．casual |
| C．careless | D．practical |
If you don't build your dream, someone will hire you to build ________.
| A．it | B．them |
| C．yours | D．theirs |
The basic design of the car is very similar to ________ of the earlier model.
| A．that | B．it |
| C．this | D．one |
The teacher assigned the task to the three boys and ________ did his share.
| A．any | B．all |
| C．every | D．each |
If you don't go after what you want, you will never have ________.
| A．one | B．it |
| C．them | D．these |