1.The reason why I went to Beijing was that I had to visit my sister.我去北京的原因是我要拜访我的姐姐.
2.I went to Beijing but I didn't see my sister.我去了北京,但是并没有见到姐姐.
3.With so many different forms of poety to choose from,I felt confused.有这么多的诗歌形式可供选择,我感到很困惑.
4.I'm hardly likely to finish it within a week.我很难在一周之内完成它.
5.I will come to help whenever you ask me.不论你什么时候叫我,