第 1 题 · 四级
The newspaper appeared on every newsstand, which sold out within a day.
核心词：newsstand ˈnjuːzstænd n. 报摊
这份报纸出现在每个报摊上，一天之内就卖光了。
一般过去时主谓 + 介词短语 + which 从句短语 on the newsstands短语 sell out
The newspaper appeared on every ___, which sold out within a day.
第 2 题 · 四级
The broken handle had to be welded on, which the worker did with great care.
核心词：weld weld v. 焊接
坏了的把手必须焊上去，工人小心翼翼地做。
一般现在时情态被动 had to be welded + which 从句短语 weld on短语 weld together
The broken handle had to be ___ on, which the worker did with great care.
第 3 题 · 四级
The company gained a foothold in the new market, which pleased its investors.
核心词：foothold ˈfʊthəʊld n. 立足点
公司在新市场站稳了脚跟，让投资者们很高兴。
一般过去时主谓宾 + 介词短语 + which 从句短语 gain a foothold短语 establish a foothold
The company gained a ___ in the new market, which pleased its investors.
