10) What makes opening piano so hard?
11) What has nothing but a head and a tail?
12) Why is 10 x 10 = 1000 like your left eye?
13) How do we know the ocean is friendly?
14) Which can move faster, heat or cold?
15) What key does not lock the door?
16) Where does June come before May?
17) Why is the letter A similar to 12 o’clock?
18) What comes twice in a moment, once in a minute and never in a hundred years?
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Sinh Học lớp 12
