解析:根据句意,Tim Bemers-Lee创立万维网应该是过去的事情,而且be considered后面应该用动词不定式,所以应该用to have done,答案为A。 原则四、非谓语动词作定语时,表示将来用-to do,表正在进行用-ing,表示已经完成用-ed 例7. The play___ next month aims mainlyto r...
made. There are many times I have been pessimistic or even disappointed by a film of a book I love. Although highly regarded books do not always make good films, it is safe to say that great films may be made from not particularly good books. (The ...
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