When is he willing to lend his friends some money— Only when ______ hard enough.

If you _____ the bottle and cigarettes, you we’ll bemuch healthier.

If she ______ well in her exams, she willgo to Beijing University in September.

I can sleep for 7 hours every day now, but if I take that job, I ____less time for sleep

result it is, you’d better check it in practice yourself.