We had just covered a distance of three miles the engine and the car came to a stop
________was difficult to save the places and buildings _____destroying their old beauty.
Helen,my parents asked me to give you some flowers______ your birthday.—Oh,please say thanks______ me.[ ]
I got quite worried _____ the coming final exam.[ ]
You can watch TV ______, but you can’t watch it ______ a long time.