—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
__ _in a heavy traffic jam in a taxi while you are hurrying to the airport is quite a unpleasant experience.
My schedule is quite ______ I could arrange to meet with you any day next week.
With your help, there is no doubt ______ our plan is meant for will work out successfully.
Crusoe isn’t good enough figure, but his outstanding skill compensates for it.
It’s ______ good feeling for people to admire the Shanghai World Expo that gives them ______ pleasure.