单项选择题
The lazy student told his parents a lie（）they had no class that afternoon.
A．what B．which C．that D．why
单项选择题 The museum（）we visited last Saturday was set up twenty years ago.
单项选择题 Not until his father came back,（）to bed.
单项选择题 My sister has been working in that factory ever（）it was set up.
