11. Asia, Africa, America and Europe are ___________. A. countries B. worlds C. continents 12. The air in Ha Noi is so ____________ that it’s hard to breathe. A. dangerous B. polluted C. noisy 13. ____________ to Ha Noi are often surprised by its busy traffic. A. Guests B. Visitors C. Friends 14. Eiffel Tower is a famous ____________ in Paris. A. architecture B. creature C. landmark 15. This ____________ building has been here for centuries. A. historic B. major C. common
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Sinh Học lớp 12
