You needn’t have apologized for your absence—      , it’s hardly your fault.

Proper exercise is good for your health._____, too much is bad for it.

.– Shall I tell Ann how to improve for painting?---Yes, but ____ of suggestions may discourage her.

It’s always difficult to live in a foreign country, ______ when you don’t speak the language. 

 After two years’ study, he now has a __________ better command of English.