—Does he know how to work out the problem ?—Yes , he has a good idea to solve it .
The Loisels did what they could ___ the debts.
The teacher entered the classroom, _____.
Let’s have another look, ___?
I __ brushing my teeth twice a day.
Dr, Robert Bell went to New York , bought some books ___ his daughter. A. visiting B. to visit C. and visited D, visited