[ Past Perfect Simple ]
Jim didn’t recognize his friend because
A. he had forgotten to charge the battery.
B. he had forgotten their wedding anniversary.
C. he had grown a beard.
D. he hadn’t studied enough.

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Tag Question › ViewDon was late, … ?
A. isn’t he
B. wasn’t he
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Before our holiday last summer, I ………………………. in a cave.
A. have never been
B. had never been