---I called you last night, but nobody answered.
---Oh, I usually___off my cellphone by 9:00 p.m.
A.switched | B.have switched | C.switch | D.had switched |
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---I called you last night, but nobody answered.
---Oh, I usually___off my cellphone by 9:00 p.m.
A.switched | B.have switched | C.switch | D.had switched |