—Can I tell Peter about the news?
—No, I don’t want anyone else to know it. You _______keep it to yourself.
| A．must | B．need | C．can | D．may |
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 |
It was dark， ______ I couldn’t see what was happening.
| A．or | B．though | C．but | D．so |