Having been ill in the bed for nearly a month,he had a hard time___the exam
-------What is it made Carl determined to give up smoking?--------Watching how his father died in pain from lung cancer.
You may use the room as you like, you clean it up afterwards.
The reason _______ he was late was _______ he missed the bus.
The tiger, once a ____ animal to humans, is now ____ of disappearing on the earth.
We shouldn’t spend our money testing so many people, most of ____ are healthy.