当我国国产大型客机C919在2017年5月5日首飞成功时,所有中国人都为之振奋.
All Chinese people when China sent its homegrown large passenger plane C919 into sky on May 5,2017.
What a fine day today! Let's go for a (野餐).
We will hold a party to say goodbye to our teachers next (星期三).
Every time I want to give up, my parents always (鼓励)me to keep trying.
The cinema was half (空的) because the movie was so boring.
Bob and Jim have been good friends (自从) they joined the same tennis team.