I’m always afraid of giving a speech in front of the class.— You can do it well.

_________ does it take –It takes about 30 minutes _________.

t smoke now, but I _______ for more than twentyyears

李明同学说话喜欢引经据典，在下面几种情境讲话时，他引用的古诗文恰当得体的一项是（ ）

Mr. Smith was thinking about how to explain to the manager why he was late for work, when a good idea ______ to him.