（2014浙江杭州）In summer milk will quickly go bad________it is put into a fridge．
A．though
B．unless
C．because
D．once
Betty will ring me up as soon as she________in Shanghai．
A．arrive
B．arrives
C．arrived
D．will arrive
They got________excited that they couldn’t get to sleep．
A．very
B．enough
C．too
D．so
The lady is so________and she believes the man who always tells lies．
A．clever
B．smart
C．stupid
D．intelligent
（2014湖北襄阳）—Your English is very good．Who taught you？
—________．I learned it all by myself．
A．Somebody
B．Everybody
C．Nobody
D．Anybody
He may lose the match________he practices hard．
A．if
B．unless
C．while
D．until
