Many of us would agree that improving the countryside through technology has great potentials ______ food development in China.

Imagine how excited we were ____ that ourschoolmates had been admitted to some famous universities.

The flowers don’t need too much water; you can just water them _____.

We met an old friend in New York ____our expectation.She waved at us _____ the street when she saw us.

You can’t imagine ________ fantastic fun online chatting is.—Really？But it may cause a lot of trouble sometimes