Doctors are doing research to find out what happens physically when people______ smoking.
.Great changes have taken place in that school. It is no longer ____ it was 20 years ago, ______ it was so poorly equipped.
.— Don’t you believe me?— ________, I won’t believe _________ you say.
.—I can’t find Mr. Smith. Where did you last see him this morning?—It was in the hotel _______ he stayed.
.You can choose ________ book you like among these on the table.
.My parents used ________they had to get a new car for my brother.