—I can’t stop smoking, doctor.
— For your health, I’m afraid you ______.
| A．may | B．can | C．have to | D．need |
—______ you help me mend the radio?
—Yes, I can.
| A．May | B．Might | C．Must | D．Can |
There is ______ wrong with this computer. It doesn’t work.
| A．something | B．anything | C．everything | D．nothing |
Parents often ask their children _____ their Internet friends because they may be in danger.
| A．to meet | B．to not meet | C．meeting | D．not to meet |
Look left and right before you ________the road.
| A．across | B．cross | C．through | D．though |
Some of the students are nearsighted______they spend too much time watching TV or playing online games.
| A．when | B．though | C．because | D．unless |