When writing, he often keeps a dictionary____.
Hiking is _____ great fun. You will get close to ____ nature and take exercise at the same time.
I couldn't imagine ______difficult it was for these badly injured victims to make it to the hospital.
—Where did you get this book?—I picked it up from a second-hand bookshop if you ______know.
—What are you two whispering about over there?—Oh, ______. Just small talk.
When I ______home, I caught a thief stealing from a passer-by.