问题
选择题
--- I called you last night, but nobody answered.
--- Oh, I usually__________off my cell phone by 8:00 pm.
A.switched
B.have switched
C.switch
D.had switched
答案
答案:C
--- I called you last night, but nobody answered.
--- Oh, I usually__________off my cell phone by 8:00 pm.
A.switched
B.have switched
C.switch
D.had switched
答案:C