He asked his father ________?
A．where it happens B．where did it happen
C．how it happened D．how did it happen
---How will you go to the zoo tomorrow?
---If it ______ tomorrow, I’ll go there by car．
A．raining B．rain C．rains D．will rain
While Helen ________ the piano，her mother came in．
A．was playing B．is playing C．played D．plays
The shorts are _________ of all, but they are _________．
A．best, cheaper B．better, dear
C．the best，dear D．good, cheap
The room was dark，_________ I turned on the lights．
A．and B．or C．but D．so
----________ have you been studying at school?
----For more than four years．
A．How often B．How long C．How old D．How far
