To stay awake, he finished a cup of coffee and ordered ______.
We ________ take clean drinking water for granted. One day we may run out of it.
Parents are doing all they ________ to help their children achieve their ambitions.
________ for the fact that she broke her leg, she might have passed the exam.
His pale face suggested he ________ angry and I suggested that he ________ at once.
I ________ sooner but I didn't know that they were waiting for me.