You won't work out the problem ______ you understand it. So listen to me explain now.
This is _______pen.. _______ pen is nice
My father likes(喜欢) soccer. He thinks(认为) it is ________.
Where ______ his jacket ? ______ on the bed..
______bag is red and ______ is red, too.
Is this ____ruler? Yes, it is. It's .