作为一名班主任，应该如何开展德育工作。
参考答案：这部分题没有标准答案
Although she has lived next to us for months, we still ________ her real name.
A．hadn’t known
B．didn’t know
C．don’t know
D．haven’t known
tg45°等于（）。
A.1/2
B.2
C.3/2
D.1
