题干
__ English is as important as __ exercise in English.
A：Spoken; writte
B：Speaking; writte
C：Spoken; writing
D：Speak; write
答案(点此获取答案解析）
A
A：Spoken; writte
B：Speaking; writte
C：Spoken; writing
D：Speak; write
(a∈R，i为虚数单位)是纯虚数，则实数a的值为( )