品句填词
1．You needn’t have bought the book because it is not worth(值得) reading at all.
2．You must work hard.Meanwhile(同时)，you must take care of yourself.
3．The working conditions(环境) of the company attract many university graduates.
4．It takes a lot of time and efforts to stop illegal trade in endangered(濒危的) animals.
5．You have to wear a life jacket for protection(保护) in case you fall into the river.
