汽油机在“吸气”、“压缩”、“做功”、“排气”的四个冲程中,将内能转化为机械能的是 冲程。
You (promise) to take our boy to Disneyland last year. Don't let him down again.
I'd like to give my thanks to Alice for (share) her exciting experiences in Africa.
The tourists had waited at the airport for two hours. They were getting (patient).
It's (high) possible that humans have to move to Mars in the future.
How can I trust you? You've (lie) to me again and again.