In an experiment, pet owners are being encouraged to take their pets to work, a move _______ can be good for both the people and the pets.
He is always ready to help others. That's one of his ________ .
-------Mrs. Green looks very worried. _______ -------The teacher called her and said her son was ill.
------ Our holiday cost a lot of money. ------ Did it? Well, that doesn’t matter ______ you enjoyed yourselves.
The question is too difficult and we found ________.
He had to speak in a loud voice in order to make himself_________.