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

The traffic is moving very slowly as so many cars   on their way back to Shanghai.

One third of the country_____ covered with trees and the majority of the citizens______ black people.

The students in our school expected ______ more time for reviews and exercises before the College Entrance Examination next year.

 Neither my wife nor I myself _____ able to persuade my daughter to change her _____.