If you miss this chance, it may be years ____ you get another one.
Though we found _____difficult to avoid economic and financial crisis, we must take measures to reduce its negative impact.
—Does_____please you to give gifts to others? —Sure.
He didn’t make_______clear when and where the meeting would be held.
一When did you learn the news that Obama made a trip to Canada as President?一_______ was on my return.
--- How long will you be staying? --- I don’t know. ________________.