I am so tired,for I ________ English for
题型:选择题
问题:
I am so tired,for I ________ English for 2 hours.
A.is studying
B.have been studying
C.was studying
D.had been studying
I am so tired,for I ________ English for 2 hours.
A.is studying
B.have been studying
C.was studying
D.had been studying