----How many times have you been to China?
--- In fact, it is the third time that I __________ here.

? Do you know the most ancient city in China ─ Xi’an well?
? No, this is the first time I ___________ here.

I give you my word, I mean what I say, ____________ you come any nearer, I will fire.

I made a promise to myself ________ this year, my first year in high school, would be different.

He spent at least as much time reading as you _______on line yesterday.

_________a stone tower near the old pine tree.

Do come here tomorrow,        we will enjoy the live performance by the “Heart-to-Heart” Art Troupe.

Researchers have found clear and convincing evidence ________ happiness is
the key to better health and longer lives.

Come and see me whenever________.

—The current European debt crisis is affecting many countries in the world.
—Will it be at least several years __________ everything returns to normal?