Green economy offers a new model ________ people could both protect the climate and develop the economy, according to what Li said at the International Cooperative Conference on Green Economy and Climate Change.

Daniel goes to the Reading Club _______ every Wednesday afternoon and goes to the Computer Club _______ Fridays. [ ]

Do you have difficulty ____ English?

What do you think of the four classics (名著)of China?－I hear that they are wonderful, but I’ve read _______ of them.

Hello, Sandy. This is Jack. What are you doing? -I’m watching a match. It started at 7 p.m. and _____ on for another half an hour.