Câu 20: ________ is the variety of different types of plant and animal life in a particular region.
A. Interaction B. Environment
C. Herbicide D. Biodiversity
Câu 21:
“Ms. Jones, please type those letters before noon.”
“They've already________________ sir. They're on your desk.”
A. been being typed B. been typed
C. being typed D. typed
Câu 22: They were sent to a local ________right after their parents’ death.
A. orphanage B. hospital C. prison D. park
Câu 23: If I ______________you were ill last week, I would have gone to see you.
A. knew B. know C. knows D. had known
Câu 24: They were seeking a solution to the ________ of the rain forests.
A. destroyer B. destruction C. destroying D. destroy
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