问题
选择题
As we all know, the number of Tibetan antelopes(藏羚羊) ________ becoming ___________.
A．is; less and less
B．are; less and less
C．is; smaller and smaller
D．are; smaller and smaller
答案
答案：C
题目分析：句意：我们都知道，藏羚羊的数量越来越少。数量the number of的be动词用is;数量的少用small。所以选C。