单选题 In relation to the other projects currently being implemented, the proposal writing task recently given by the supervisor is of ______importance.

【正确答案】 A

【答案解析】解析：可修饰充当介词of宾语的名词importance的应为形容词，故形容词的比较级(A)higher为正确答案。副词的比较级(B)，副词(C)和副词的最高级(D)都不能修饰名词。