Every year a great number of foreign tourists pay a visit to _____ we Chinese call Heaven Lake.
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.
I haven’t got any paper _____.