___________you try to do something beyond what you have already mastered, you will never grow.
—I wonder if you could go with me to the shopping mall.—Don’t disturb me. I ______ my experiment report all the morning and haven’t finished yet.
—Would you mind if I open the door?—______
She was so angry that she rushed out into the rain ______ I could stop her.
While listening to the concert, the audience is required to remain ______ and keep quiet.
It is important to know about the cultural differences that______ cause problems.