What can be inferred from the passage about the practice of animal parents feeding their young?
A.It is unknown among fish.
B.It is unrelated to the size of the young.
C.It is dangerous for the parents.
D.It is most common among mammals.

The author lists various animals in line 5 to…
A.contrast the feeding habits of different types of mammals
B.describe the process by which mammals came to be defined
C.emphasize the point that every type of mammal feeds its own young
D.explain why a particular feature of mammals is nonelective

How many national parks _____ in Vietnam by far?
A.have been set up
B.are set up
C.have set up
D.are being set up

All the tables _____ away before the guests turned up.
A.were taken
B.had been taken
C.had taken
D.were being taken

This house, _____ has a TV and a washing machine, is very modern.
A.which
B.that
C.where
D.in which

Mr Thanh, _____ children are studying at Hanoi Foreign Trade University, is working as a professor of economics.
A.whose
B.whom
C.who
D.of whom

That Peke is an intelligent student _____ to me.
A.shows
B.showed
C.was shown
D.was showing

Had she learnt Spanish, she _____ to Spain a long time ago.
A.go
B.would go
C.would have gone
D.will go

Read the passage and choose the best answer to each question.
A new study shows that women can reduce their chances of developing heart disease by jogging for about three hours every week. The researchers at Harvard University Medical in Boston have just reported the results of the study on the New England Journal of Medicine. The study is the first to show the effectiveness of jogging in the developing of heart disease in women. Only a few earlier studies have examined the effects of jogging on the heart, but nearly all have been done on men. The new study involves more than 72,000 women between the ages of forty and sixty-five during a period of eight years. The researchers have found that women who jog at least three hours a week have a thirty to forty percent lower chance of suffering a heart attack than those who do not.
Who have done the research?
A.The journalists on the New England Journal of Medicine
B.The researchers at Harvard University Medical in Boston
C.Women between the ages of forty and sixty-five
D.Some joggers

Read the passage and choose the best answer to each question.
A new study shows that women can reduce their chances of developing heart disease by jogging for about three hours every week. The researchers at Harvard University Medical in Boston have just reported the results of the study on the New England Journal of Medicine. The study is the first to show the effectiveness of jogging in the developing of heart disease in women. Only a few earlier studies have examined the effects of jogging on the heart, but nearly all have been done on men. The new study involves more than 72,000 women between the ages of forty and sixty-five during a period of eight years. The researchers have found that women who jog at least three hours a week have a thirty to forty percent lower chance of suffering a heart attack than those who do not.
How many hours should women jog at least a week to reduce heart attacks?
A.3
B.40
C.65
D.72