_______ Tom at school yesterday afternoon–No , he______ with his friend Timmy in the river.

Once you __ working with the professor, you will findhe is not as tough as expected.

He was inspired to start again _________ he had failed.

Liu Xiang was born in Shanghai _____1983.

Why do many people like to ride bikes—-Because bikes not only need ________ space, but also cause _________accidents.