In 1942,Columbus and his crew arrived ____was so-called the New World by the westerners.
They asked the government to make ______clear to the public ______ they did was right.
The reason why he failed is ______ he was too careless.
We were about to climb up to the top of the mountain ________ it began to rain heavily.
—How do you find my idea? —_______.
Don’t you think that______________ is no use promising without doing?