You seem familiar with Mr. John-Of course, we_______ together for three years in the 1990s.

You have no idea how she finishen the relay race______ her foot wounded so much.

Are there any trees on _____ sides of the new street—Yes, there are.

I remember there _____ a lot of fish in Yanglan Lake. Now it has been polluted.–What a pity! I think we should play a role in protecting the environment.

I saw your mother in the library just now.—It ______ be her. She went to Beijing yesterday.