.
We separate the waste in our classroom to make it ________ .
A to reuse B reusing C reuses D to be reused
You cannot be ____ careful when you drive a car.
| A．very | B．so | C．too | D．enough |
Time should be made a good use ____ our lessons well.
| A．of to learn | B．of learning | C．to learn | D．to learning |
They arrived there at last, ____.
A. was tired and hungry C. being tired and hungry
C. tired and hungry D. tiredly and hungrily
I am sure I can help you find ____ bed for your new house, but now I'm heading for____ bed and ____ good sleep.
| A．a , a , the | B．a , / , a | C．the , a , a | D．a , the , a |
_____ this instrument should have put its work permit number on the box.
| A．Who checked | B．Whoever inspected |
| C．No matter who examined | D．Those who estimates |