There _____ a lot of red-crowned cranes in this area.

问题描述:

There _____ a lot of red-crowned cranes in this area.
There _____ a lot of red-crowned cranes in this area.
A.was used to B.was used to be C.used to be
选出来过后说一下理由,不会请不要乱讲,

答案选C
过去曾经有……
A被用来做,后面接不定式;或习惯于,后面接名词或动名词的.
B被用来是……(一般没有这个结构的)