请选择ABC-b-v;p.U7@8m*p4o8m5g.L,aHow many students ____ in your class?,H2x/J1v,};h5X-d7G;V
A. are there,H2x/J1v,};h5X-d7G;V
B. there are,H2x/J1v,};h5X-d7G;V
C. are they,H2x/J1v,};h5X-d7G;V