* Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.

 Endemic diseases are diseases that habitual infect only those persons living within certain geographical limits.

A. Endemic diseases

B. that

C. habitual infect

D. living within

* Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.

Endemic diseases are diseases that habitual infect only those persons living within certain geographical limits.

A. Endemic diseases

B. that

C. habitual infect

D. living within

* Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.

The medical problems of parents and their children tend to be very similar to because of the hereditary nature of many diseases.

A. their

B. tend to

C. similar to

D. because

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Vaccines are one of the most important measures of prevention medicine to protect the population from diseases and infections.

A. measures

B. are 

C. prevention

D. infectious

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Vaccines are one of the most important measures of prevention medicine to protect the population from diseases and infections.

A. are

B. measures

C. prevention

D. infections

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Despite modern medical technology, many diseases causing by viruses I are still not curable.

A. Despite

B. many

C. causing

D. curable

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

What we know about certain diseases are still not sufficient to prevent them from spreading easily among the population

A. What we know about

B. are

C. from spreading

D. among

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

What we know about certain diseases are still not sufficient to prevent them from spreading easily among the population.

A. What we know about

B. are

C. from spreading

D. among