____ the bike Smith had stolen ?
—Do you think_____ worthwhile to go all the way to Los Angles to buy that computer?—Well ,I’m going to visit some relatives, too.
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.