题目内容：

词填空：用括号中所给单词的正确形式填空。

1.Please allow me ______________ (introduce) myself first.

2.Jim _________________ (talk) on the phone when the man came in.

3.John often spends a lot of time _______ ( play) computer games.

4.Would you mind__________ (open) the windows?

5.To our_________（surprised, we found the owner of the lost dog.