Over the past decades, sea ice _______ in the Arctic as a result of global warming.
Mr. White didn’t understand __________ made his wife so upset this morning.
Visitors are not permitted ________ the park after dark, because of the lack of lighting.
---___________ everyone present at the meeting?---No, all but one _________ there.
All possible means __________.However, nothing can __________ Jack from adventuring in that mysterious forest.
-How do you like our restaurant?-I couldn’t have found a ________ one.