中国大学MOOC: When ( ) the airport, he waved goodbye to us.
举一反三
- ________ the airport they waved again and again to me. A: When left B: When leave C: When to leave D: When leaving
- 中国大学MOOC: Lewis tells us that he grew up in an environment with very serious racial discrimination in US. (Unit 7 Passage A)
- , they waved again and again to us. A: When leaving B: To leave C: Being leaving D: Having left
- 中国大学MOOC: when meeting a clients at the airport, wed better arrive at the airport at least 15 minutes earlier.
- 中国大学MOOC: When it was time to say goodbye, Lisa gave her daughter a(n ) _______ kiss.