精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区

Some birds fly                in winter and some stay in the north.

A. south        B. the south         C. in the south          D. to south

Some birds fly                in winter and some stay in the north.

A. south        B. the south         C. in the south          D. to south

. Some birds fly_______________in winter and some stay in the north.

A. south    B. the south     C. in the south     D. to south

 Some birds fly_______________in winter and some stay in the north.

A. south    B. the south     C. in the south     D. to south

Some birds fly_______________in winter and some stay in the north.

A. south　 B. the south　　 C. in the south　　 D. to south

Some birds fly __________ in winter and some stay in the north.

    A．south               B．the south           C．in the south         D．to south