We will keep you _____ of our progress and look forward to hearing from you..

Not until recently ____________ the development of tourist-related activities in the rural areas.

We were about to go outing______ it beganto snow heavily.

the summer camp, I realized I wanted totake a route ________ I could use English all the time.

The little boy has a habit of _____ his toy cars, which makes his parents very angry. [ ]