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

According to some optimistists, by the end of the 21st century, our astronauts ______ on Mars.

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.