What did you think of her speech? — She _______ for one hour but didn’t _______ much.

I’ veusing plastic bags when shopping.– You’ re right. It’ s good for our environment.

Boy, you _______ lean (伸) out of the window while the bus is running. That’s dangerous.—Sorry, I won’t do that again.

____________, I wouldn’t have finished my homework.

Gina_____ a lot since she joined the art club.