Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.

Night milk quickened the start of sleep and caused the mice to sleep longer.

While the effect of cows milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.

Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.

Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.

24.According to the text, the mice fed with daytime milk_______.

A.started sleep more easily

B.were more anxious

C.were less active

D.woke up later

25.Which of the following is true of melatonin according to the text?

A.It's been tested on mice for ten years

B.It can make people more energetic

C.It exists in milk in great amount

D.It's used in sleeping drugs

26.What can be a suitable title for the text?

A.Night Milk and Sleep

B.Fat Sugar and Health

C.An Experiment on Mice

D.Milk Drinking and Health

27.How does the author support the theme of the text?

A.By giving examples.

B.By stating arguments.

C.By explaining statistical data.

D.By providing research results.

C

Modern day robots may not be as entertaining as R2D2 or the robot from Lost in Space, but robots are very important to space exploration and are being used in a variety of different ways for several important reasons.

Robots make great explorers on planets, moons, and other landing areas. Aside from the earth, just about every surface in the solar system is unsafe for humans to explore. The air on most other planets is insufficient for humans to explore. The air on most other planets is