1, B-evidence(1)
2, A-development(1)
3, B-breathing/i:/
4, D-experiment/e/
5, C-believe/i:/
6, A-eat: người pháp
7, D-so few
8, B-who I lent
9, A-he wrote: rút gọn mệnh đề
10, D-Some children are too lazy to get any exercise
11, A-I go to: rút gọn mệnh đề
12, B-taking: ghi chú
13, D-put: chấm dứt
14, C-Not only đi Boris break his leg but also injured his shoulder:đảo ngữ