________ dog is clever. （   ）

A．Simon

B．Simons

C．Simon's

Danny found the underground station at last after walk.  (   )

A．15 minute's

B．15-minutes

C．15 minutes

D．15 minutes'

用所给词的适当形式填空。
1. Three years ago we ________ (begin) to learn English.
2. ________( Jack) father gave a car to him yesterday.
3. My father wants us ______ (go) to Beijing with him.
4. We ______ (do) role play just now.
5. My teacher taught me ____ (read) these words.

Here are two ____the Great Wall. (    )

A．pictures

B．picture

C．pictures of