连词成句我最棒。帮小青蛙排队。

1. it    a    western    is    holiday  

                                                                                                          .

2. they    gifts    for    us    bring  

                                                                                                          .

3. please    for    Christmas    come  

                                                                                                          .

4. we    our    family    invite    friends    and    our    house    to   

                                                                                                          .

5. songs    Christmas    they    at    sing    special

                                                                                                          .

依照《矿山安全法》的规定，每个矿井必须有( )以上能行人的安全出口。

A．一个

B．二个

C．三个

D．四个