相关题目
Jim knows about birds well. He can（ ） the songs of most birds.
Once they （ ）their mistake, they stopped the machine and re-checked it.
Students should （ ）their hands before asking questions in class.
The patient will be performed a （ ）on his left foot. The doctor is explaining the details to him.
This brand of wine is in short （ ）at the moment, so it is very expensive.
The newly-built bullet train runs at the （ ）of 300 kilometers an hour.
It is dangerous for them to drive on the road at full （ ）.
The eye is the window of the （ ）.
When president Mar won the election, people said that it was a political （ ）from different parties.
I am always lost. I really have no （ ）of direction.
