Câu 16: Sperm whale populations are at risk ______ hunting and their accidental entrapment in fishing nets.
A. because B. in spite of
C. thanks to D. due to
Câu 17: Some plants and animals are referred to as ______ organisms because they are extremely small.
A. youngest B. tin C. big D. tiny
Câu 18: These plants cannot ______ in your garden. It never gets any sun.
A. survivor B. surviving C. survive D. survived
Câu 19: Sperm whales are ______, which means they eat meat.
A. omnivores B. herbivores
C. carnivores D. mammals
Câu 20: ______ air makes people unpleasant to breathe.
A. Pollution B. Polluting C. Pollute