-What were you doing at 7:00 yesterday evening, Lisa?
-I ________ up the kitchen with my mother.
clean
cleaned
was cleaning
am cleaning
The big trees __________ some shade __________ us.
— We finished counting all the birds, Miss Zhang. — ______ ! Boys and girls, let’s have a rest.
— Look! The girl with long hair is drawing a picture. Is she Sandy?— It ______ be her. I’m not sure.
We should do everything we can to protect the birds ______ danger.
-- Don’t cross the road when the traffic lights are red. -- .