两道英语题 谢谢了

问题描述:

两道英语题 谢谢了
Ling Feng took care of Jim’s bird _______ he was away.
A. during B. sinceC. beforeD. while
她保持健康的饮食,尽力避免增加体重.
She always eats healthily and ___________________________________________________.

1.D,while,表示当...这里就是当他不在的时候这段时间.
try to avoid putting on weight.
try to do sth.尽力做某事
avoding doing sth 避免做某事.
put on weight.增加体重,习语.为什么A C D 不对?A,druing表“在此期间”。 后接短语,而这后面是句子。不对吧。B,since一般用在完成时中。意思是自.....C,before,在...之前。语境不符。