Li Ke ___________runs in the morning, for he wants to be healthy.
A. never B. often C. hardly
All the information except these two pieces _____ writing the article.
| A．have been used to | B．has been used to | C．have been used for | D．has been used for |
What is the best way you think of ______ the environment?
| A．to protect | B．protecting | C．protect | D．protected |
---How does your brother like the song Two Butterflies?
---Great! He _____ such a beautiful song before.
| A．doesn’t hear | B．never hear | C．is never heard | D．has never heard |
-- How are you feeling here?
--- It’s quite hot. I don’t know _____ to go or stay.
| A．how | B．when | C．whether | D．where |
You_______ play with the knife. You ______ hurt yourself.
| A．mustn’t; may | B．mustn’t; must | C．shouldn’t; must | D．can’t; should |