問題詳情
22. With power failures ________ at an increasing rate, it is time the government started looking for a moreeco-friendly way of living.
(A) happening
(B) to happen
(C)happened
(D) happen
參考答案
答案：A
難度：適中0.40566
統計：A(86),B(16),C(81),D(12),E(0)
用户評論
【Rajar Chang】評論
不及物動詞 happen, fail, rise, miss, drop 恆用主動