从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
1. Discuss the problem _________ minute before I give you _________ answer.
A. the; the B. a; the C. the; an D. a; an
2. During the flight to the Moon, Chang’e I Satellite gradually__________ her directions so that she can go into her programmed orbit.
A. adjusts B. adopts C. adapts D. accepts
3. －Is John coming by train?
－He __________, but he can’t. All the trains have been cancelled because of the snow.
A. may B. will C. must D. should
