There was so much noise that the speaker couldn’t make himself _____.

These tickets for the performance are （ ） until the end of the month．

As population increases, （ ）.

It is important that the boy （ ） an adult to take care of him.

Herman’s success is （ ） his hard work and his academic ability.

I left for the office earlier than usual this morning （ ） traffic jam.

The defense computers calculate way to （ ） the enemy missiles.

She finally decided to obtain a _____ from the bank in order to buy a house.

I’m trying to be more （ ） when I go shopping, and only buying what I really need.

The football player is hoping to（ ）to another team soon．

He had never given a speech to so many people, so he felt（ ） .

Scientists say it may be five or six years （ ） this medicine is tested on human beings.