_____ people in the world are sending are receiving e-mails every day.
| A．Million of | B．Many millions of |
| C．Several millions’ | D．Several millions |
Helen ______ to a language school when she was seven.
| A．sent | B．is sent | C．was sent | D．will send |
She ______ very hard since she came to our school.
| A．studies | B．has studied |
| C．is studying | D．studied |
Even Tony’s six-year-old son asked him ______ smoking.
| A．stops | B．stopped | C．stopping | D．to stop |
The schoolboy ______ a blind man cross the street yesterday.
| A．helps | B．helped | C．will help | D．has helped |
— Can he jump high?
— Yes， he ______. He is a good high jumper.
| A．can | B．need | C．must | D．shall |