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【单选题】
Which information goes in (C)?
A.
Bats are a source of SARS.
B.
Rain forests are the "lungs" of the planet, helping to keep our air healthy.
C.
pr the spread of diseases, protect possible sources of medicine, and conserve the planet's oxygen
D.
Concluding ideas
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】(A) Since Maria needed vaccines to travel, she made an appointment with the doctor. (B) _________ vaccines to travel, Maria made an appointment with the doctor.
A.
Needed
B.
Needing
C.
Since she needed
【单选题】(A) Because we wanted to find jobs, we moved to a bigger city. (B) _________ to find jobs, we moved to a bigger city.
A.
Wanting
B.
Having wanting
C.
Wanted
【单选题】(A) Because it sold more than expected, the drug company ran out of medicine. (B) _________ more than expected, the drug company ran out of medicine.
A.
Selling
B.
Sold
C.
Because selling
【单选题】He keeps them in _____.
A.
plastic bags inside plastic boxes
B.
their original packages