单项选择题

1900年7月，沙俄大规模入侵中国黑龙江流域，制造了震惊中外的江东六十四屯惨案。

A．对
B．错

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https://news.cgtn.com/news/2021-03-04/Chinese-students-studying-abroad-from-home-YlPKDF0GDS/index.html
Watch the video and decide whether the following statements are true or false.
The colleges in the U.S. are "most likely" going to switch back to the in-person learning mode or the hybrid mode in the fall semester, and safety is going to be the primary concern for the universities.

A．对
B．错