38.1how long did you study in___a.germanb.germansc.germanyd.
How long did you study before you qualified.为什么不是have you st
How long did you sleep
how long did you skate?
how long - you - study in our country
how long did you stay in Beijing?
how,spend,did,there,long,you(?)
How long did you stay there?
-How long did you wait me?
How long ago did you start school?
how long did you ____ it
how long did you stay there?能否改为 how long did you stay at th
1How long----you----(study) english since you came here?