Using many symbols makes _______ to put much information on a single map.
To his surprise, the lifestyle he was used to ______ greatly in the past few years.
______ that another miner has been rescued from the flooded Wangjialing coal mine.
“This is ______ most useful reference book,” a teacher from ______ European country told us in class.
--I must apologize for ahead of time . --That’s all right .
.People have planted a great many trees in order to _____ wind and sand in the desert.