The public transport system in Beijing is very good now, so there _____be any difficulty in traveling around the city.
Edward, you play so well, but I you played the piano.
People often have this belief ______ development is bad for the environment, but this does not have to be true.
If we ______ the other road, we might have arrived here in time for the meeting.
Jessie, my best friend _______ me of some really bad things just to hurt me. I felt betrayed.
twice a year, whether it is a car ,a bus or a truck, is the rule that every driver must obey in this city.