Where is Alice—Oh, she __________ an English song in her room.

下列各句中，加点成语使用恰当的一句是：（ ）（3分）

The total cost is $200. If you can pay half of that, I’ll ________ the rest.

Yuan Longping, a great person in China, _____as “father of hybrid rice”

Only after they had discussed the matterfor several hours ______a decision.