Chatting online can be _____fun, but kids must be sure they stay safe on _____web.

1. A.
   不填; a
2. B.
   a; the
3. C.
   不填; the
4. D.
   a; a

Chatting online can be _____fun, but kids must be sure they stay safe on _____web.

A. 不填; a      B. a; the       C. 不填; the     D. a; a

 Chatting online can be _____fun, but kids must be sure they stay safe on _____web.

A. 不填; a                       B. a; the                    C. 不填; the             D. a; a

Chatting online can be _____fun, but kids must be sure they stay safe on _____web．

A．不填; a           B．a; the         C．不填; the           D．a; a

Chatting online can be _____fun, but kids must be sure they stay safe on _____web.

A．不填; a          B．a; the          C．不填; the        D．a; a