Do keep ____ ,will you? A.to try B.try C.having tried D.trying D ,我选了A If you think a letter is too slow,why not try ___ a telegram? A.to have sent B.to send C.to be sending D.sending B ,我选了D 请详细说明try to do/doing的区别及上面两题为什么答案是对的.
1.keep doing sth. 一直坚持做某事。 2.keep to do sth. 作不同的一件事,一般是指放弃前面做的事,又开始坚持做另外一件事。 1.try to do sth. 努力做某事。 Eg: I try my best to finish the work. 2.try doing sth. 尝试做某事。 Eg: I tried...