Due to lack of protection, the hills which used to be covered withgreen trees are now mostly _________A. blank B. bareC. vacant D, hollow
—Hi, this way, please. —OK. I sometimes have no sense of ________when I arrive at the crossroad.
Along with the letter was his promise ________he would visit me this coming Christmas.
I was just talking to Margaret when Jackson________.
Now many crops can be improved ________different species of plant, such as rice, wheat.
________of food ________to the countries struck by the seaquake(海啸).