—Everybody is going to climb the mountain . Can I go too , mom ?
— ______ Wait till you are old enough ,dear.
| A．Will you | B．Why not ? | C．I hope so. | D．I’m afraid not. |
Over the past l00 years，sea levelsteadily as a result of global warming．
| A．had increased | B．has been increasing | C．increased | D．is increasing |
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 |