On which day is Halloween celebrated each year（）
A. The second Sunday in May.
B. The fourth Thursday in November.
C. February 14.
D. October31.
查看答案
It can be inferred that during the test, （）.
A. water is pumped into the plane instead of air
B. more air is pumped into the plane than usual
C. water exerts great pressure on the skin of the plane
D. the weaker parts receive greater pressure
6（）
A. realistic
B. effective
C. efficient
D. practical
Which of the following is NOT mentioned as part of Halloween celebrations（）
A. Pumpkins.
B. Candles.
Costumes.
D. Flowers.
5（）
A. on
B. for
C. with
D. to
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