--The river used to be clean. How does it become dirty?
-- There are many factories ________ waste water into it.
A. pouring B. pour C. poured
After visiting different countries, I found _______ very important to learn about table manners.
| A．it | B．that | C．this | D．us |
–Lucy, please don’t play with fire!
–_______.
| A．You’re welcome | B．I don’t think so |
| C．That sounds good | D．Sorry, Miss Li |
Jack’s mother was twenty-seven when he was born. Jack is eleven this year. How old is his mother?
| A．56 | B．49 | C．38 | D．40 |
–What do you think of The GrandMasters, Lily?
–I love it. I think it’s a very successful action movie, _______ Tony thinks it’s boring.
| A．and | B．because | C．if | D．but |
–What does your friend look like?
–She is of medium build, and she has _______ hair.
| A．sad | B．long | C．busy | D．small |