It is generally believed that teaching is _____ it is a science.
| A．as art much as | B．much an art as |
| C．as an art much as | D．as much an art as |
The teacher apologized late.
| A．to his students to arrive | B．to his students for arriving |
| C．at his students to arrive | D．at his students for arriving |
----May I open the win
dow to let in some fresh air?
----
A. come on! B Take care! C Go ahead! D Hold on
It took me a long time before I was able to fully appreciate what they _____ for me.
| A．had done | B．did | C．would do | D．were doing |
He had a wonderful childhood, _____ with his mother to all corners of the world.
| A．travel | B．to travel | C．traveling | D．traveled |
The country ,_______ cherry tree flowers ,looks _____ it is a sea of pink snow .
| A．covers with… as though | B．covered with… as though |
| C．covering with…as if | D．is covered with ….as though |