Choose the correct option A, B, C, or D for each gap in the passage.

Well, I think (1)______ some ways to keep fit. Firstly, we should eat (2)______. Don’t eat too much fast food. Some people have a big hamburger and a soft drink (3)______ lunch. It isn’t a good idea (4)______ that meal doesn’t include any vegetables. Instead, if they want to have a quick healthy lunch, they (5)______ buy some avocado sushi. Secondly, we shouldn’t deep-fry food. We should steam it. (6)______ dishes don’t use any fat. If you like, you can also stew lean meat with vegetables. It’s healthy and nutritious.

Question 5:

A. should

B. ought

C. has to

D. had to

Tia tới đi qua quang tâm của thấu kính hội tụ cho tia ló

A. đi qua tiêu điểm

B. song song với trục chính

C. truyền thẳng theo phương của tia tới

D. có đường kéo dài đi qua tiêu điểm