Last night, I was playing the piano_______ the doorbell rang.
A. while B. when C. after
The girl is new here and she lives ______. So she seems ______.
A. lonely; lonely
B. alone; lonely
C. lonely; alone
—I’m going to Shanghai with my father for our holiday this month.
—________.
A. Have a good trip!
B. Best wishes to you!
C. Please go!
The girl had to stop playing tennis ______her illness.
A.instead of B.because C. because of
现在许多学生骑自行车去上学，也有很多人骑车去上班，因为骑自行车有许多的好处。但是由于自行车与机动车共享车道，也存在着安全隐患。所以骑自行车的人要注意一些安全事项，请根据以下参考词汇，写一篇60—80词的短文。
1. save energy; air pollution; park; traffic rules; helmet; careful.
要求：结构完整，条理清晰，语言通顺。
1.
as…as
__________________
2.
seem/ because/ ill
_______________________
3.
if , rules, fine
_________________
4.
run, while, swim
________________________
