They have dinner at seven thirty.

他们七点半吃晚餐。

同一单元的其他句子

• I wake up at seven o'clock.我七点起床。
• What time do you have breakfast?你几点吃早饭？
• I brush my teeth after breakfast.早饭后我刷牙。
• She goes to school by bus.她坐公交车去上学。
• We have lunch at noon.我们中午吃午饭。