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

According to scientists (A) who study birds,(B) upon hatching,(C) ducklings have already known to swim.(D)

Mark the letter A, B, Cor D on your answer sheet to indicate the correct answer to each of the following questions

Many people are dying _______ various types of cancer.

Mark the letter A, B, Cor D on your answer sheet to indicate the correct answer to each of the following questions

He was feeling bad. He went to work, _____ , and tried to concentrate.

Mark the letter A, B, Cor D on your answer sheet to indicate the correct answer to each of the following questions

Her eyes were bright and ______. They always looked active and energetic. 

Mark the letter A, B, Cor D on your answer sheet to indicate the correct answer to each of the following questions

The English people have a saying about the weather that it rains _______. 

Mark the letter A, B, Cor D on your answer sheet to indicate the correct answer to each of the following questions

Her husband was always there and she just took him ________. 

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

The life span (A) of a domestic cat at home is said to be (B) far shorter (C) than a wild tiger (D) in the jungle

Mark the letter A, B, Cor D on your answer sheet to indicate the correct answer to each of the following questions

I must go to ______ post office to buy some stamps to send this important letter on time.