She ________ in his English till now , but Wei Hua still works hard in order to be____ at it.
At the foot of the hill ___ surrounded by trees.
--How often do you eat out?--___, but usually once a week.
The old man went into the room, ___ by his wife.
The new teacher made a good ___ on the students by her rich knowledge and humorous talk.
I’m pleased to see the problem ___ so quickly.