—When did you become a volunteer？
—I________in this group since 2008．
A．joined
B．took part
C．have joined
D．have been
Basketball is so popular a game that________people play it for fun and exercise．
A．million of
B．millions of
C．millions
D．two millions
—I have bought a nice dress．
—Where________you________it？
A．have；bought
B．did；buy
C．will；buy
D．do；buy
He wants to________you on the question of how to learn English well tomorrow．
A．get back
B．talk with
C．tell
D．speak
Have you ever been to Shanghai________？
A．a month ago
B．yesterday
C．ago
D．before
—Have you locked the windows________？
—Yes，I have________locked them．
A．already；already
B．yet；yet
C．yet；already
D．already；yet
