请选择DCBA3]2d*g8g/Q6s The boy said he was afraid of _________ alone.-H5`;_2^,e+Z:\0O6a7n(t-i(e
A. be-H5`;_2^,e+Z:\0O6a7n(t-i(e
B. being-H5`;_2^,e+Z:\0O6a7n(t-i(e
C. is-H5`;_2^,e+Z:\0O6a7n(t-i(e
D. are-H5`;_2^,e+Z:\0O6a7n(t-i(e