经典句子
1. Worried about the time available, Zhang Pingyu had made a list of the sites she wanted to see in London.
【观察】本句中过去分词短语Worried about the time available在句子中作___________(成分)。
【活用】Unless ___ to speak, you should remain silent at the conference.
A. invited B. inviting C. being invited D. having invited
