It was impolite of him ____without ____good－bye

New technologies have made ______ possible to turn out new products faster and at a lower cost.

Building a new school is one thing, while keeping it running smoothly is quite_______.

________ no point in beating around the bush. Let's ________.

Nowadays everything strange is ________ strange. That is to say, any unexpected thing is possible to happen.

When you go outing with your sisters, you must see to ________ that they are safe.

Use your head! Nothing taught by others can have the same effect on you as ________learned by yourself．

I want to be a volunteer some day. I feel _____ is my duty to help others.

— Do you have Gone with the Wind?
—Yes, but no more than one copy．Would you like to take______?

We find      easy to get along with our new friends here.