We started to skate two hours ago．（对画线部分提问）
________ ________you start to skate？
He ran in the school for half an hour．（对画线部分提问）
________ ________ ________he run in the school？
I________English for about six years．
A．learn
B．am learning
C．have learned
D．will learn
The Smiths have moved away！I really miss them．They________a lot of help to the community for nearly ten years．
A．offered
B．will offer
C．are offering
D．have offered
—You speak Chinese very well．________have you learnt，Amy？
—For two years．
A．How long
B．How often
C．How soon
D．How far
Mr.Smith has worked in China________two years ago．
A．in
B．for
C．since
D．until
