Though he is _____ worker, he works very hard.
-If we take a plane, we’ll of course have arrived in London by the next weekend.-Don’t be too sure. We should _____ the weather factor. What shall we do if it is foggy?
_________ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.
---What made it difficult for him to find a job?---_______, I think.
._____ the article four times, I finally understood the author's theory.
. Only_______of the houses in the town________ not destroyed in Wenchuan big earthquake.