China replaced Japan in 2010 as No. 2economy, _____ China’s continuing rise in economic and political influences.

I don’t know______ he lost his gold watch yesterday.

May I go now — No. You ______________ let the teacherknow first.”

Hello! Is Mr. John in the office—Yes. But I’m sorry. He is busy _____ and can’t speak to you.

The horse _____the distance in 28 hours ____thetrain’s six days