He sighed again and the failure in physics seemed to have completelyhis confidence.

I _____ sooner but I didn’t know that they werewaiting for me

Here you are at last! What kept you so long?—Sorry, I’m late. But do you know what great difficulty I have ______ your house.

Amy loves to talk about travel and she ____ many places of interest.

It was only when I reread his poems (诗) recently _____ I began to appreciate their beauty.