_____ on everyday practice, progress in English is a goal which can be achieved．
A．Based B．Basing C．Having based D．Being based
Look out! Keep away from the house, _____ the roof is under repair．
A．whose B．which C．of which D．where
．You'd better get the problem solved as soon as possible ______ it becomes out of control．
A．when B．before C．since D．unless
—Happy Birthday, Ken! Did you invite Jason?
—Yes, but he _____ a meeting in New York otherwise he wouldn't be absent from my birthday party．
A．is attending B．has attended C．was attending D．attended
—Mom, can I have that transformer?
—Behave yourself and you____ have it．
A．could B．shall C．must D．may
Liu Jialing won ___ Best Actress Award for her role at ___ 30th Hong Kong Film Awards．
A．the,/ B．a, the C．the, the D．/,the
