动词填空 用括号内所给动词的适当形式填空。(本大题共8分，每小题1分)
After hearing the latest news, Tom suggested ________ (sell) the house but Ann was against it.
— Which is heavier, water or oil?
— I was told by my physics teacher long ago that oil ________ (float) on the surface of water.
— Were you feeling shocked when you got his message at that moment?
— Yeah. As we ________ (not contact) each other for years.
— A report says the H7N9 virus has caused a serious problem in some Chinese provinces.
— Exactly. If it is not stopped or cleared in time, more people ________ (affect) soon.
Nearly half of the village which had been there for nearly one thousand years ________ (burn) down by the great fire this January.
— Dear! Why didn’t you answer my telephone?
— Sorry! I ________ (attend) an important meeting then. My mobile phone was left in my office.
— I’d like to add a little bit of more sugar to the coffee.
— No need. I ________ (put) enough.
Small steps can be taken ________ (reduce) pollution in our daily lives.