—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
They will start their project _____at helping the poor children to be educated in China’s west.
---John always thinks of others instead of himself.---So he does. It is _____of him to want to help others.
I like this house with a beautiful garden in front, but I don’t have enough money to buy _______.
Most people________ what Fang Zhouzi has done against the dishonest professors and research.
--- You mean we will have the mid-term exam in early November? --- Yes. ________