我有绝对正确的把握!
1.B
用非限制性定语从句,which代指前面整个句子Exposure to excessive noise levels may cause varying degrees of inner ear damage,在定语从句中_____ is initially reversible充当主语.
2.C
what flowers to plant和前面的how to proceed是两个并列的“疑问词 + 不定式”结构,都做动词know的宾语.
3.B
hang作为“绞死/吊死”解释时,是及物动词,其过去式/过去分词是hanged,而不是hung/hung.
此题句意为被动“被绞死”,所以用过去分词hanged.