He started school the same day as I did and ________ to it like a duck to water.
We all feel it is Jack as well as his wife that ________ for their son's bad performance at school.
—Do you know Anna's telephone number?—________.As a matter of fact,I don't know any about Anna,either.
It is strange that the well-behaved gentleman _______ be so rude.
Down __________ and hurt his leg.
The two presidents agree with each other on the whole, but much remains ______ at the following meeting.