—Look! The man at the gate ______ be our headmaster. He is always standing there every morning.—No, it ______be him. He is holding a meeting in the office now.
____________ careful you are, _____________ mistakes you’ll make.
Jim did what he could the poor children.
The weather here is different from ________ in Beijing, but the people here are as friendly as _________ in Beijing.
If you feel ill, you__________ us in the game today.
The Changjiang River is longer than ______________ river in China.