—Oh, doctor, The wound on my leg is infected. —You really shouldn’t have left it _______ to the sun.
We must __________ that the experiment is controlled as rigidly as possible.
The bank has _________ some property on which to constructed.
The island in the middle of the lake _____________ the beauty of the lake.
It is important for us to employ a word or phrase according to the ________ in language studies.
The boy will make a lot of trouble when ____________ alone.