... afraid ………… swimming in the sea? A in B for C of D off 30 Newton, whose theory of ………… is very well-known, is an English scientist A electricity B evolution C gravitation D relativity 31 Unless we ... about D on 38 Smoking is ………… to your health A harmed B harmful C harmless D unharmed III Đọc đoạn văn sau, chọn câu trả lời/ ý nhất: Once you have reached London, you can go about in taxis, buses, ... taxis B in buses C by underground D all of them 40 Why does the writer prefer the underground ?-Because ………… A it’s rapid B it’s cheap C it’s easy D all of them 41 We can not drive along the...