how many countries -----in the meeting next weekend i'm not sure.A are there B will are thereC will there be D be will there.并说出原因,

问题描述:

how many countries -----in the meeting next weekend i'm not sure.A are there B will are there
C will there be D be will there.并说出原因,

c
因为是将来时 且语序b,d皆有错误