The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
Happy birthday , Alice ! So you have____twenty-one already !
It is _____world of wonders,____ world where anything can happen.
What surprised me was not what he said but____he said it .
-----Where _____you put the ruler? I can't see it anywhere.----I put it right here. But now it is ____.
--What should I wear to attend his wedding party? --Dress ____ you like.