第 1 题 · 六级
The old bulb has a thin filament inside, which the careful electrician has replaced twice this year.
核心词：filament ˈfɪləmənt n. 细丝，灯丝
旧灯泡里有细灯丝，细心的电工今年已换过两次。
现在完成时主谓宾 + 定语 + 副词 + which 从句（现在完成 + 频度）短语 a thin filament短语 a tungsten filament
The old bulb has a thin ___ inside, which the careful electrician has replaced twice this year.
第 2 题 · 六级
The wool has a gentle softness, which the happy baby has felt with its little hands.
核心词：softness ˈsɒftnəs n. 柔和，柔软
羊毛很柔软，开心的宝宝用小手指触摸到。
现在完成时主谓宾 + 定语 + which 从句（现在完成 + with）短语 a gentle softness短语 the softness of silk
The wool has a gentle ___, which the happy baby has felt with its little hands.
第 3 题 · 六级
The sad song filled him with melancholy, which the quiet musician has often felt in autumn.
核心词：melancholy ˈmelənkəli n. 忧郁；adj. 忧郁的
这首悲伤的歌让他充满忧郁，安静的音乐家在秋天常常感受到。
现在完成时主谓宾 + 介词短语 + which 从句（现在完成 + 频度）短语 deep melancholy短语 a melancholy mood
The sad song filled him with ___, which the quiet musician has often felt in autumn.
