(2013 ·湖北武汉武昌高三联考)Smiling doesn’t ________ mean you’re happySometimes, it just means that you’re strong enough to face problems

a has become China’s largest online commercial company, _____ aprofit of 1.47 billion yuan in 2010.

Tom speaks English very well. He in China since 2002.

Stop! You can never touch this machine when it ________, it is very dangerous

Did you callon any of your old friends when you returned to your hometown—_______ ofthem. They were all very busy.