鲤鱼在天上飞。[ ]

翻译以下短语并完成句子。

1)at /by one s command_

2)under one's command _

3) take command of _

4) have a good command _

5)command sb. to do sth.

6) The army is_____．军队由国王直接  统率。

7) He_____ to attack=He  that his troops should attack.他命令他的部队进攻。