第 1 题 · 四级
She enrolled in an art course, which she attends every Saturday.
核心词：enroll ɪnˈrəul v. 注册，登记
她报名参加艺术课程，每周六都去上。
一般过去时enroll in + which 从句短语 enroll in短语 enroll at a school
She ___ in an art course, which she attends every Saturday.
第 2 题 · 四级
The thief vanished into the crowd, which made the police unable to find him.
核心词：vanish ˈvænɪʃ v. 消失
小偷消失在人群中，让警察找不到他。
一般过去时vanish into + which 从句 + make sb unable to do短语 vanish into the crowd短语 vanish from
The thief ___ into the crowd, which made the police unable to find him.
第 3 题 · 四级
Science has entered the realm of space, which was a dream a century ago.
核心词：realm relm n. 领域；王国
科学已进入太空领域，这在一个世纪前还是梦想。
现在完成时现在完成时 + the realm of + which 从句短语 the realm of短语 the realm of science
Science has entered the ___ of space, which was a dream a century ago.
