It is none of your business _________other people think about you. Believe yourself.
| A．how | B．what | C．which | D．when |
It is difficult to between Mary and her younger sister
| A．decide | B．distinguish | C．explore | D．express |
You have done so much that you are pass the exam．
| A．bound to | B．turn to | C．adjust to | D．object to |
The fact has worried many scientiststhe earth is becoming warmer and wormer．
| A．what | B．that | C．though | D．which |
Do you still remember the rider and his new bike we saw in the street last week?
| A．which | B．who | C．that | D．whom |
Tony the fact that he had made a mistake．
| A．accounted | B．permitted | C．allowed | D．acknowledged |