Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.
In a room above the store, where a party _____ in half an hour, some workers are busily setting the table.
Speaking of all the songs he has written, I think this is probably his _______ one.
The medicine works more effectively _______ you drink some hot water after taking it.
--- Bob, you are absent-minded! --- Oh, I’m sorry I _______ attention to you, Miss Shute.
There was a teapot shaped like a duck, out of _______ open mouth the tea was supposed to come.