It’s said that scientists have ________ a way to deal with the serious disease
I wonder if he tonight. If he , I’ll let you know.
- The air pollution is terrible.- It will be worse ________ we take action to protect the environment.
______ he talked with her for a long time, he failed to convince(说服)her.
Mr Smith usually reads a newspaper he’s waiting for the bus.
Many teenagers think they ____ to play computer games on weekends.