第 1 题 · 高考
He was oblivious to the noise, because he was lost in his book.
核心词：oblivious əˈblɪviəs adj. 未察觉的
他对噪音毫无察觉，因为他沉浸在书中。
一般过去时原因状语从句短语 be oblivious to短语 oblivious of
He was ___ to the noise, because he was lost in his book.
第 2 题 · 高考
The plateau is high and dry, which makes farming there quite difficult.
核心词：plateau ˈplætəʊ n. 高原
高原又高又干燥，这让那里的耕作相当困难。
一般现在时make + adj. + which 定语从句短语 a plateau短语 the Tibetan Plateau
The ___ is high and dry, which makes farming there quite difficult.
第 3 题 · 高考
He sharpened the pencil before the test, which helped him write clearly.
核心词：sharpen ˈʃɑːpən vt. 削尖，使锐利
考试前他削尖了铅笔，这帮助他写清楚。
一般过去时which 非限制性定语从句短语 sharpen a pencil短语 sharpen a knife
He ___ the pencil before the test, which helped him write clearly.
