1.学生们正在听老师讲.
The students _are____ __listening___ ____to_ the teacher.
2.你经常给你父母写信吗?
Do you often ___write_ ____to your _parents___?
3.他们正在吃午饭吗?
_Are___ they _having___ ___lunch_ now?
如果不懂.、,还可以问我
1.学生们正在听老师讲.
The students _are____ __listening___ ____to_ the teacher.
2.你经常给你父母写信吗?
Do you often ___write_ ____to your _parents___?
3.他们正在吃午饭吗?
_Are___ they _having___ ___lunch_ now?
如果不懂.、,还可以问我