Now people have come to realize ________ harmful pollution is.
| A．that what | B．it | C．that how | D．how |
You don't have to worry about me. I'm old enough tomyself.
| A．look after | B．look for | C．look up | D．look at |
—Hello, may I speak to Sandy?
— .
| A．Yes, I’m Rose | B．I’ll call back again |
| C．Yes, I can’t hear you | D．This is Sandy speaking |
Chineseby more and more people from all over the world today.
| A．learn | B．learned | C．is learned | D．was learned |
--Morn, must I clean my room now?
--No, you . You can do it tomorrow.
| A．can't | B．needn't | C．mustn't | D．shouldn't |
Helen was so excited at the news that she couldsay a word.
| A．ever | B．almost | C．hardly | D．always |