17. She "doesn’t" allow anyone "smoking" "in" her "own" room.
A B C D
18. "Changeable" and "uncertain" people are incapable "in" "true" friendship.
A B C D
19. It "took" "him" two hours "flying" "to" Ha Noi.
A B C D
20. While I "had" "a" bath, someone "knocked" "on" the door.
A B C D
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