---I saw Betty       to Grandpa Li's home just now.---Yes. She’s often seen _________ the old man with the housework.

The sick in our country       taken good care of by the government.

Mr. Bush,  together with his wife and daughter _____ going to Japan next week.

There ______ a number of students in our school. The number of the students ______ more than 7000.

There ____ a table, four chairs, three bikes in the courtyard, in the  middle of which ____ two tall trees with great shade.