______ is it _____ has made Peter _____ he is today?
More than 200 dead pigs in the waterways have raised urgent concern.
—Professor Smith, can I meet you at 10 o’clock tomorrow morning?—Oh, I’m sorry. I a lecture at Hunan Normal University.
Chinese President Xi Jinping promised on Sunday, “We’ll make great efforts the Chinese dream.”
–--I am terribly sorry, Lucy. I’ve left your notebook at home.---___? I reminded you last night.
If it ____for the snow, we____ the mountain yesterday.