1.There are many kinds of metals, ________.
A.each having its special properties.
B.Having its special properties.
C.One has its special properties.
D.Each has its special properties.
2.He remembered _______ to the zoo by his father when he was little.
A.being taken B. taking
C. have been taken D. to have taken
3.The team really looks good tonight because the coach had them ______ every night this week.
A.practice B. to practice
C. practiced D. practicing
4.______ in the air, fuels give off heat.
A.To burn B. Burned
C. To be burned D. Being burned
5. ______ from space, our earth, with water covering 70% of its surface, appears as a “blue planet.”
A. Seen B. Seeing
C. To be seen D. Having seen
答案:1-5 AAACA
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