Our math teacher however speak English well.A. doingB. doesC. is doingD. was doing

问题补充：

Our math teacher, however, speak English well.

A. doing

B. does

C. is doing

D. was doing

答案：

A. doing

B. does

C. is doing

D. was doing

解析：

其中的does, did均为强调用法。