Scientists are working hard to make _______ possible for people to live on Mars in the future.
—Jim takes______ his father. --- You mean he is similar _____his father?
Don’t put off ____ to the doctor when you are ill.
May I _______ your bike? ---With pleasure. But you mustn’t ____ it to others.
You eat _______ junk food. I think you need________vegetables.
Aron wrote a bookBetween a Rock and a Hard Place