– Did you notice John was not at work today?--- No. If _____working, I would have noticed it.
Tony is coming with _____ boys.
There is ______ word in the dictionary.
The teacher asked us to put weekends ______ good use.
Only when _____ the painting _____ decide whether the painting is worth buying.
Staying up is bad _____ you , but getting up early is good _____ your health.