Perhaps you ________ stop playing computer games now. Your boss may be turning up in the office at any moment.

My most devoted friend, Professor Yang, _______ often go hiking when he lived in the mountain that was covered with forest.

“Is there a flight to London this evening?” “There _______ be. I’ll phone the airport and find it out.”

We apologize for any inconvenience you _______ have been caused by the delay of the flight.

—How's this pink evening dress? I wear it to the party _______ shall I choose that white one?—They both look beautiful, but I think your blue dress is suitable.