问题：
In my opinion, all Mr. Li ______ good to his students in his class at present. He is very strict with them in their studies.
A．does does does
B．does do did
C．does does do
D．did do does
In my opinion, all Mr. Li ______ good to his students in his class at present. He is very strict with them in their studies.
| A．does does does | B．does do did | C．does does do | D．did do does |
参考答案：