231. In 1919, the May Fourth Movement ________, beginning with a large-scale new cultural movements in China.
Mary ___________to see you.She._________ for you downstairs at the moment.
The bad weather meant__________ the rocket launch(发射)for 48 hours,.
She was afraid __________ the dog in case it became dangerous.
I__________ you somewhere before, but your name has escaped me_________.
—When__________ and visit our exhibition next month? — When_______, I will let you know.