The careless man received a ticket for speeding . He ____ have driven so fast .

There ______ little water in the river.

—Mike’s parents have bought a 2-floor house with a swimming pool.— Oh, it________ be very expensive.

The colour yellow______ the feeling of________．

----Will you take up teaching as a career after graduation?---- Hard to say. I ________ go abroad for higher education instead, but it depends.