Robert is interested in ________ astronomy and he wishes he could make a trip into ________ space one day.
In my opinion, Jack, though relatively stubborn, was not too difficult ___.
Having heard the touching stories of “the most beautiful teacher”, she ____tears .
Wang Lin failed to be admitted by Hong Kong University last year, and only then _______ the importance of English.
---I regret _____you John has been fired.---I can hardly believe my ears.He’s such a fine worker.
---Alice, you look puzzled, Have you understood it?---Yes.I _____another problem just now.