题目内容
(单句改错)They have never had the chance to be there ago.
答案：
去掉ago
(单句改错) They don't know what was happened to them.
(单句改错) They can't see unusual anything in this room.
(单句改错) They have some problems get there.
单句改错
They will visit an eshibition in Beijing next week．________
