Hundreds of small islands spread out on the vast sea ________ the famous coast[ ]

However, at times this balance in nature is disturbed, ____ a number of possibly unforeseen effects.

John isn’t here right now. He ______ Mr. Black’s office. Perhaps he______ in several minutes.

The accident took place ______ a cold February evening.

They put forward a lot of plans at the meeting, none of ______ carried out in their work.