be supposed to do — 英语选择题

At a cultural dinner, the rule was to wait until the host raised a glass before …

At a formal dinner, the host says, “It’s the custom here to wait until every…

用 be supposed to 的正确形式填空：When you meet a Japanese friend, you …

In Mia’s town, people greet each other with a handshake. Mia is new there, so …

根据句意，用 have 或 has 加括号中动词的适当形式填空（过去…

Mary 的乒乓球不见了。Ben 打开抽屉，把球拿出来递到 Mary 手�…