I wonder ____ we can solve this hard problem.
It isn't so much whether he works hard; the question is whether he works _____.
___ by the beauty of nature, the girl from London decided to spend another two days on the farm.
She will have to find some other work for she can’t ________ this loud noise any more.
____ in her best suit, the girl tried to make herself ____ at the party.
The secretary is very careful and never ___ any little points in her daily work.