If you cannot have a good command of grammar as well as precise usage of each word you’ve learnt, it is ________ for you to use English flexibly.
This means going back to the place where we left the family ____ in a tree the night before.
Most birds find it ____ to sleep in the trees.
The children talked so loudly at dinner table that I had to struggle ____.
Peter earns ____ his brother does.
Edward couldn’t remember when he first met Mr. Crook, but he was sure it was ____ Sunday because everybody was at ____ church.