We ______ (be) late for the plane because we ______ ...

★ Past Perfect

We ______ (be) late for the plane because we ______ (forget) our passports.

A. had been / forgot

B. were / had forgotten

C. are / forgot

D. were / forgotten

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The lights _______ (go) off because we _______ (not pay) the electricity bill.

A. went / hadn’t paid

B. had gone / didn’t pay

C. went / didn’t pay

D. had gone / hadn’t paid