____ the morning of December 1st, 2006, the 15th Asia Games ___ in Doha(多哈).

The only system I know ____ will help you remember what you have heard at a lecture is the system of keeping notes.

______ careful you are, ______ mistakes you will make.

He got completely______ when he saw both Lucy and Lily, who are twin sisters.

Here’s my card, let’s keep in ___.