has been a great increase in retailsales , ____﹖

The map is one of the best tools a man has __ he goes to a new place．

You can go and ask my mother. She is willing ______ you _______ your English.

As a laid-off worker, it is hard for her father to ______ the family, let alone send his children to key schools.

Bob could have seen the famous pop star ______ yesterday morning.