.

It was _____ his mother came in _____ to prepare his lessons.

A．not until; did the boy begin

B．until; that the boy didn’t begin

C．until; did the boy not begin

D．not until; that the boy began

根据《勘察设计注册工程师管理规定》，下列选项不属于注册工程师权利的是（）。

A.在规定范围内从事执业活动

B.获得相应的劳动报酬

C.保守在执业中知悉的他人的技术秘密

D.对本人执业活动进行解释和辩护