We cann’t figure out______ quite a number of insects,birds and animals are dying out. A. that B. as C. why D. when
A.A
B.B
C.C
D.D
正确答案是C
We cann’t figure out______ quite a number of insects,birds and animals are dying out. A. that B. as C. why D. when
A.A
B.B
C.C
D.D
正确答案是C