问题
I study math by ____ lots of exercises.
A:did
B:doing
C:do
D:does
B:doing
C:do
D:does
正确答案是：
同类题型
The apples arealready smelling. You shouldn’t have chosen that kind for me. — _______.
The party last night was ____ success Wesang and danced until it came to ____ end at :
Many of his classmates came to his birthday party; it was a great success to him.
Is Jay coming by bus?— He should, but he ____ not. He likes cycling along.