补全对话。

A: I want _____________ put this table _____________ there. But it's _____________ heavy.

    Could you _____________ me?

B: _____________! _____________ do you want to put it?

A: Under the tree.

B: _____________.

A: Please _____________ a bottle of orange.

B: _____________ you.

A: Would you like another one?

B: No. _____________.

一架飞机水平匀速地在某同学头顶上飞过，当他听到飞机的发动机声从头顶正上方传来时，发现飞机在他前上方约与地面成60°角的方向上，据此可估算出此飞机的速度约为声速的多少倍？