Visitors ______ not to touch the exhibits.
Experts believe that land that is becoming deserts ________ the size of Australia, Russia and the United States put together
形容词与副词及其比较级与最高级 From his ________ voice on the phone I know everything is going under way
Tom and John are going swimming with ________ boys this afternoon
Many a man ________ swimming in the river, but only ________ can swim across it
To our surprise, he is always finding excuses of one sort or ________ for his being late