单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

[A] Grin. [C] Red.
[B] Yellow. [D] Grey.

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单项选择题

[A] They eat or spoil crops. C. They attack birds and animals.B. They destroy dams and buildings. D. They carry diseases.

[A] They eat or spoil crops.
C. They attack birds and animals.
B. They destroy dams and buildings.
D. They carry diseases.

填空题

C

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