Scientists are trying their best to_______ ways to treat the terrible disease caused by Ebola(埃博拉).
Why ________ out to play games?
She read a lot of comic books and some storybooks _______.
Can you finish the work well with _________ money and ________ people.
I have two pens. One is red, and ________is black.
He always looks. Now he’s lookingat his new drawing.