—— Tom, did Mr.Li join you in your dicussion? —— No, he____, but he happened to have fallen ill.
________ his spare time that his English has improved a lot.
The Chinese government holds that peace and development ________ the Taiwain Straits is the correct path.
In the early morning, all of us stood at the top of the mountain to ________ east of the city, watching ________ burning sun rising.
Have you bought the same book ________ I referred to yesterday?
_____ to drive after drinking, some drivers are still trying their luck, which is dangerous.