________ a vocation, and you’ll forget unhappy things
A.Going on | B.To go on |
C.Go on | D.If you go on |
The United States of America___one of the most developed countries in the world.
A.is | B.are | C.was | D.were |
The Olympic Games ____ held every ____ years.
A.is;four | B.are;four | C.is;five | D.are;five |
A chemical works____ built there.
A.is to being | B.have been | C.were to | D.has been |
Chairman Mao' s works ____ published.
A.has been | B.have been | C.was | D.is |
The Arabian Nights ____ well known to the English.
A.is | B.are | C.was | D.were |