.If this computer does not give complete satisfaction, please return it to the maker stating when and where it was ________.
Please correct the mistakes ________.
The ________ look on his face suggested he ________ that.
Attention, please! And keep ________ when I am taking a photograph of you.
______ him to do like this, he wouldn’t have made such a serious mistake in his writing.
The house is too old. It requires ________.