we must keep quiet in the reading room.(保持原句意思不变)We must keep quiet in the reading room.(保持原句意思不变)We _______ _________ in the reading room.

问题描述:

we must keep quiet in the reading room.(保持原句意思不变)
We must keep quiet in the reading room.(保持原句意思不变)
We _______ _________ in the reading room.

can't talk

mustn't talk