16.Mrs Smith----- her keys in the office so she had to wait
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16.Mrs Smith----- her keys in the office so she had to wait until her husband ------home.
A has left;comes B left;had come
C had left;would come D had left;came
A has left;comes B left;had come
C had left;would come D had left;came
![16.Mrs Smith----- her keys in the office so she had to wait](/uploads/image/z/2008141-61-1.jpg?t=16.Mrs+Smith-----+her+keys+in+the+office+so+she+had+to+wait)
D
前面过完表示对现在的影响,until后+过去式
前面过完表示对现在的影响,until后+过去式
16.Mrs Smith----- her keys in the office so she had to wait
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动词时态的Allen ____ her keys in the office.So she had to wait un
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