We're leaving at six o'clock , and hope _____ most of the journey by lunch time .
| A.to do | B.to have done | C.to make | D.to have made | 
We work together to achieve our common purpose:_________world that is safer, cleaner and healthier than one we found.
| A.the;the | B.a;不填 | C.a;the | D.the;不填 | 
_________ the wind and the sun, the color on the board gradually ran.
| A.Being exposed to | B.Having exposed | C.Exposing | D.Exposed to | 
It is proposed that another meeting _______ to discuss how to give more support to the underdeveloped area.
| A.be held | B.have been held | C.was held | D.will be held | 
_________ I picked up the receiver, I realized that someone had dialed the wrong number.
| A.The moment | B.A moment ago | C.After a minute | D.Minute after | 
 Snow is rare in this area. You can hardly see any snow, ________ it is winter.
| A.ever since | B.now that | 
| C.even though | D.even so |