Dan Brown，_____ author of The Da Vinci Code， is _____ very famous American writer．
A． a; the B． the; the
C． the; a D． a; a
Jack， it’s too hot here．______ I open the window？
A． Shall B． Will C． Should D． Would
_____ he promised that he wouldn’t be late， he didn’t arrive until the end of the party
A． Since B． Although
C． Because D． Until
Since the new speed limits ______，the number of accidents in the area has fallen strikingly．
A． were introduced
B． introduced
C． have been introduced
D． have introduced
When Kerry and Sam met again two years later， each was pleased to see ____．
A． the other B． others
C． another D． other
Tony couldn’t remember ______he had turned off the computer before he left the office．
A． that B． where
C． when D． whether
