One of the objectives by the Natural Approach is to enable the students to make the meaning clear but not necessarily be ______ in all details of grammar.

A．correct

B．accurate

C．brief

D．concise

脓性中耳炎耳源性颅内外并发症最常见的侵犯传播的途径是（）。

A.血行途径

B.循破坏、缺损的骨壁

C.正常的解剖途径

D.尚未闭合的骨缝

E.上述都不是