What worried the child most was ______ to visit his brother n hospital.
In order to make our city green, _______.
In order not to be disturbed ,I spent three daysin my study.
He sat back on the chair, took a book and began to read, ___.
David apologized for ______ to inform me of the change in the plan.
They really have a great time too , designing everything , drawing the blue prints ,the angles and so on .