—Bad news?
—If you ______ know, Li Na got defeated again in the first round!
| A．can | B．will | C．shall | D．must |
No one has yet succeeded in solving the _____ of how life first began.
| A．biology | B．gravity | C．puzzle | D．theory |
_______ his sister, Jack is quiet, and does not easily make friends.
| A．Dislike | B．Unlike | C．Along with | D．As to |
. The television station reported several times to _________ drivers parking their cars on the blind road.
| A．prevent | B．keep | C．forbid | D．protect |
——Can I smoke here? ——Sorry. We don’t allow _______here.
| A．people smoking | B．people smoke | C．to smoke | D．smoking |
Can you tell me ______?
| A．what does the island look like | B．what the island looks like |
| C．how does the island look like | D．how the island looks like |