English is ________ useful language so that most people speak it as ________ second language.
| A．a; the | B．an; the | C．an; a | D．a; a |
相关试题
There isinsect on the ground. The child is very interested in it.
| A．a | B．/ | C．the | D．an |
People have learned a lot from
studies．
| A．science | B．scientific |
| C．scientist | D．sightseeing |
with the police.
粤公网安备 44130202000953号