As is known to all, a block of ice will ________ if it is exposed to heat.
The two boys look so much alike _______no one can tell them apart.
I was so crazy _____the football that I'm made ______captain of the school team.
-----Will you help me do this? -----____________, do it yourself.
Some pre-school children go to a day care center, __________they learn simple games and songs .
The boss has ________to improve the working conditions in the company.