— How long have you been here？— ______ the end of last month，

Anger is good for you, ____ you control it properly, according to new psychology research.

He misunderstood _____ I said.

Pop music is such an important part of society __ it has even influenced our language. 

The dog may be a good companion for the old. _______, the need to take it for walks may be a disadvantage.