I cannot __________ puzzled, for I simply cannot understand how I could have made such a stupid mistake.
It is ten years since we _______ each other last time.
They are living with their parents at present because their own house ________.
In general, I would agree with him, though not _____.
My parents finally _____ and agreed to buy me a new cell phone as my birthday present
For _____ information about present national boundaries, wed better refer to an up-to-date map.