按要求改写下列句子
They are going to visit the Great Wall. (否定句)
They______  ______  ________ to visit the Great Wall.
People are having afternoon tea. (一般疑问句)
______  _______  ________ afternoon tea?
The children are enjoying themselves. (同义句)
The children are _________ a ________ ________.
He never plays computer games at home. (用now改写句子)
He _____ ______ computer games at home _________.
No one will write on a blackboard with chalk. (同义句)
No one will _____ chalk _____  ______ on a blackboard with chalk.