delve
(1) assiduously a.徒劳无功地搜寻 ______
(2) ineffectually b.仔细地钻研 ______
(3) inquisitively c.勤奋地探索 ______
(4) scrupulously d.好奇地探索 ______
(5) studiously e.认真地搜寻 ______

【参考答案】

(1) c
(2) a
(3) d
(4) e
(5) b