--- Would you have called her up had it been possible? --- Yes, but I busy doing my homework.
Sam insisted that he________ the law and________.
—________ when has the country been open to international trade? —1978,I suppose.
What shall we use for power when all the oil in the world has________?
No matter what you do,you must ________ your mind________ it.
He thinks only of himself;he doesn’t________ other people.