根据各句中所给汉语注释，写出其正确形式。

1．It is ________（不可能的）for us to finfish the work in such a short time．

2．I think you can solve the problem ________（容易地）．

3．Would you mind ________（关闭）the door?

4．The car is too expensive and I can't ________（买得起）it．

5．They bought a house ________（有）a big garden．