If I find his phone number，I ____________ you.

Whose advice do you think I should take–______.

Since the Obama administration took office,the China—US relations ________ positive development thanks to joint efforts ofboth sides, President Hu said at the Nuclear Security Summit inWashington, April,12,2010.

Dave, can you tell me about your ________yesterday—Of course. I saw an alien when I was playing in the park.

The country has ________ too many wars.