4A. takes - That is the laboratory where we do all our experiments.
5D. that - I’m absolutely no good at all at any kind of sport.
6C. at - It’s difficult calculation. Can I borrow your calculator?
7C. pencil case - Duy’s friends are waiting for him to put on his schoolbag so they can go to school together.
8A. rubber - You can use a rubber to draw circles.
9D. book - After school, they usually play football.
10B. rides - Cuong and Minh ride their bicycles to school from Monday to Friday.
11A. finishes - School finishes at 4:30 p.m. every day.
12C. finishing - Children will work hard if the lessons are interesting.
13C. pleasant - I’m always nervous when I’m taking an exam.
14B. excited - The children look very excited while playing games during break time.
15C. excitement - Wellspring Saigon is an international school.
16B. gymnasium - Carol believes that going to the gymnasium regularly is a good way to be healthy.