Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
| A．/; the | B．the; / | C．an; the | D．the; a |
Now then, children, Its time you ________.
| A．were washed and dressed | B．washed and dressed |
| C．are washed and dreesed | D．washed and dress |
My parents used ________they had to get a new car for my brother.
| A．which | B．all what |
| C．what | D．不填 |
Chicago is on ________ Lake Michigan. There is nothing in the world like ________ Chicago meat industry.
| A．the；the | B．不填；不填 |
| C．the；不填 | D．不填；the |
Do you think the reason ________ he gave is believable?
| A．for which | B．which | C．why | D．what |
This is an illness that can result in total blindness ________ left untreated.
| A．after | B．if |
| C．since | D．unless |