Change the active sentence to passive.
Passengers must show valid tickets.
A. Passengers show valid tickets.
B. Passengers might show valid tickets.
C. Valid tickets shown by passengers.
D. Valid tickets must be shown (by passengers).

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Grammar › View…………………he said made me very angry.
A. That
B. What
C. Which
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“It was nice of you to invite me to lunch,” Bob said to John.
A. Bob thanked John for inviting him to lunch.
B. Bob wanted to express his thanks for his inviting to lunch.
C. Bob said it was nice of John to invite him to lunch.
D. Bob said to John it was nice of you to invite me to lunch.
Comparisons › ViewI live in ____ city in the world.
A. comfortablest
B. comfortable
C. the most comfortable
D. most comfortable
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She ________ (not, be) six years old.
A. isn’t
B. not is
C. are not
