“If you’re walking down the right path and you’re willing to keep walking,_____ you’ll make progress”, said the president Obama.

We used to see each other       , but I haven’t head from him since last year.

Drunk driving used to occur _______, but now it is under control.  

Are you paying now, or shall I ＿＿＿＿＿＿ to you? 

 Our journey was slow because the bus stopped at different villages________．