________the help of the police, the old woman found her way to her son’s.

I study math by ____ lots of exercises.

Wow, Wendy, it’s cool to make a short video with your mobile phone.—Just with a software called Meipai. Let me show you .

I promise that she _____ get a nice present on her birthday. —It will be a big surprise to her. [ ]

____ that you came here yesterday— By train