.In 1942,Columbus and his crew arrived____was then called the New World by the westerners.

Mary is from England，but ________ friend Jim isn’tEnglish．

The monkey thought hard, then he ____ idea.

The experiment has_________ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets.

Our usual walk is to or from the subway, ______ is how we get to work．