Hello, Sam! How is the weather in London today—It is _____. It is snowing ______ now.

Will you be able to come and help us clean the room—— I’m doing my homework.

City air is very dirty， so it would be wise ______ you to wash your hair often.— I know， but it is not easy ______ me to do that every day.

(2009湖南娄底重点高中联考) students are required to take part in the boat race．

He _____ to us that those eggs which were _____ on the table had been _____ by snakes.