The summer vacation is coming． Have you （选择） a date for your travelling？
Mother's Day， every restaurant is filled with families．
The Notre﹣Dame Cathedral（巴黎圣母院大教堂） （burn） by fire on April 15， 2019．
I enjoy （think） of ways to help people in need．
Transportation engineers have a lot to think about．Problem﹣solving is a big part of ___ （they）jobs．
It takes me hour to do exercise every day．