（届北京市海淀区高三下学期期中练习）
Mr. Smith couldn’t open the door because his naughty boy ______ it from the inside.
| A．would lock | B．was locking | C．has locked | D．had locked |
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（届北京市海淀区高三下学期期中练习）
Mr. Smith couldn’t open the door because his naughty boy ______ it from the inside.
| A．would lock | B．was locking | C．has locked | D．had locked |
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