---Let’s see if the basketball game has started yet. ---Started? It must be clear who   by now.

Do you know when Mr. Brown _______? When he _______ , please let me know.

At 2004 Athens Olympic Games, Liu Xiang excited people all over Asia when he became the first Asian _______ the gold medal in the men’s 110-meter hurdles.

—Did you enjoy meeting your old schoolmates at the party last week?—Yes, I did. We ________ each other since we graduated from college.

By the time she ________ tomorrow, the work ________.