第 1 题 · 高考
The barcode on the box helps the shop check the price, which saves time.
核心词：barcode ˈbɑːkəʊd n. 条形码
盒子上的条形码帮助商店核对价格，节省时间。
一般现在时help sb do + which 定语从句短语 a barcode短语 scan a barcode
The ___ on the box helps the shop check the price, which saves time.
第 2 题 · 高考
The BBC broadcasts news worldwide, which millions of people listen to.
核心词：bbc ˌbiː biː ˈsiː n. 英国广播公司
英国广播公司向全球播报新闻，数百万人收听。
一般现在时broadcast + which 定语从句短语 the BBC短语 BBC news
The ___ broadcasts news worldwide, which millions of people listen to.
第 3 题 · 高考
The city was built in 300 BC, which has a very long history.
核心词：bc ˌbiː ˈsiː n. 公元前
这座城市建于公元前300年，历史悠久。
被动语态 + in + 年份短语 in 300 BC短语 before Christ
The city was built in 300 ___, which has a very long history.
