Students are always asked to do much homework，Have you read the following passages？

You'd better not work when you're very hungry．If you（16） 　 　your homework right after school，you may have a snack before getting to work．Always do your homework（17） 　 　you get tired．（18） 　 　wait until very late in the evening，or the homework will seem much（19） 　 　 than it really is．

Break your time into manageable（易处理的） period．If you have more than（20） 　 　，give yourself a break after an hour．On the other hand，don't break it up（21） 　 　that you can't get anything done．You should be able to work at least half an hour at a time（22） 　 　．Don't put it off until the last（23） 　 　．If you put off doing your homework，you will always think of it，and you won't enjoy your （24） 　 　so much．If you put it off until the end of the week or until right before a test，you will have too much work to do for the exam．

A little bit each night，enough to keep up with what is happening each day in school，will take the fear out of tests and keep you on top of it all．Do your homework（25） 　 　every day．This will help you make it a habit．It will make it easier to do，and it will make free time more enjoyable as well．

16．A．decide to do	B．decided doing	C．have done	D．did
17．A．after	B．when	C．because	D．before
18．A．Not	B．Please	C．Don't	D．Always
19．A．harder	B．hard	C．easy	D．easier
20．A．one hour work	B．an hour work	C．a work of an hour	D．an hour's work
21．A．so much	B．so little	C．so often	D．so well
22．A．with a stop	B．without stopping	C．stopping	D．stop
23．A．week	B．hour	C．minute	D．day
24．A．lunch	B．free time	C．meals	D．snack
25．A．at a time	B．in a short time	C．once	D．at the same time．