It's important to eat (1)_________, especically when you' re (2)_________ studying. If you are at (3)_______, you may not go home for lunch, and have a cooked meal of meat or fish and vegetables. Or perhaps you takes some food (4) ________ you go to school, and eat it in the lunch break. A chicken and lettuce sandwich, with some fresh fruit, would be a light (5) _____healthy lunch. Many people (6) _______ the world eat plain, boiled rice two or three times a day.

 People and students often don't eat well when they are revising for (7)_____ exam they eat chocolate and drink lots of black coffee! By the way, doctors say everybody (8) _______ start  the day with a healthy (9) _________. It is also good for you to drink a lot of (10) __________ right through the day.

1) A. many.          B. good.           C. better.          D. well.

2) A. to study.      B. study.           C. studying.      D. studies.

3) A. primary.       B. school.         C. room.           D. office.

4) A. with.             B. about.          C. to.                D. for.

5) A. because.      B. so.               C. but.              D. and.

6) A. for.               B. at.                C. with.             D. around.

7) A. and.             B. lots.              C. all.                D. a.

8) A. must.           B. should.         C. should not.   D. will.

9) A. dinner.         B. lunch.           C. breakfast.     D. supper.

10) A. coffee.       B. tea.               C. coke.            D. water.

They have a lot of................. in the summer.          (ACT).

\(\dfrac{2}{3.5}+\dfrac{2}{5.7}+\dfrac{2}{7.9}+...+\dfrac{2}{37.39}\\ =\dfrac{1}{3.5}+\dfrac{1}{5.7}+\dfrac{1}{7.9}+...+\dfrac{1}{37.39}\\ =\dfrac{1}{3}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{9}+...+\dfrac{1}{37}-\dfrac{1}{39}\\ =\dfrac{1}{3}-\dfrac{1}{39}\\ =\dfrac{13}{39}-\dfrac{1}{39}\\ =\dfrac{4}{13}\)