they failed many times,but they （c ）to work hard.

they failed many times,but they （c ）to work hard. They have failed many times,( )(但是总有一天)they'ill be successful. They’re Tim.的中文? _out many approaches,they failed to solve the problem A.Tried B.Trying C.To try D.Having tried 英语翻译我做翻译题的时候写了They have failed for times.这句话对吗?老师说不对,但我好像在哪看到过,是不是改成They have failed times.就对了呢.还是（They have failed for many times.）有时候能省略many的 they who should come failed to appear. tim Tim They tired to climb the high mountain,h____,they failed. she showed particular interest in many things which other people failed to see,failed They are Tim and Jack、 对Tim and Jack 提问 ___are their ____? I told him many times but he failed ( )(understand)it. _he failed many times,_he never gave up. He failed many time.He gave up.(改为简单句) Tom and Tim are twins.they are twin b什么 Although Tim and Mile come from_____different backgrounds,they became close tough ____many times,tim didn't lose heart.如题空中填having failed.求教为什么这么填? He failed to do sth,后面用so did Tim./Neither did him.why?我选后者的