The population of Zhengzhou is much than that of Shanghai.

We _______ talk loudly when wesee the sign “ Be quiet ”on the right.

I’m afraid the book I have lent youwon’t be interesting enough—___

e has achieved more in controlling the AIDS virus than Asia in the past ten years, _________ the number of people infected with the virus is going up sharply.

The tourists didn’t stop to rest at each station because it ______them down.