一Were you at home at 9：00 last night? I called you but nobody answered．
—Sorry, I _______ at that time．
| A．take a shower | B．took a shower． |
| C．was taking a shower | D．am taking a shower |
一Were you at home at 9：00 last night? I called you but nobody answered．
—Sorry, I _______ at that time．
| A．take a shower | B．took a shower． |
| C．was taking a shower | D．am taking a shower |
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