Great! We will have a _____ holiday.
太棒了!我们将有一个七天的假期。
a seven-day holiday=a seven days' holiday,意为“一个七天的假期”。故选A。
The volunteers _____ the sick kids in the hospital on weekends.
志愿者们周末在医院照顾生病的孩子们。
look after 照料,照顾;look for 寻找;look through 浏览。根据句意可知选A。
She was tired,_____ she continued her work.
她很累,但是她继续她的工作。
so 因此;until 直到……为止;but 但是; that 那个。分析语境可知,此处要用表示转折关系的连词,因此用but。