[ Grammar ]
I lost my keys when I ________ (walk) home.
A. walked
B. walk
C. is walking
D. was walking
Select your answer:

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TOEFL Grammar › ViewA large crowd _____ in front of the train station.
A. gathering
B. to gather
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Past Perfect Tenses › View
I ___ (forget) my keys at home that morning.
A. forgets
B. forgot
C. forgotten
D. forgetting
