The old lady’s hand shook frequently. She explained to her doctor ______ this shaking had begun half a year before, and ______, only because of this, she had been forced to give up her job.

Let Simon and_______ friends.

Can I ______ your bike, Sam—Sorry, I ______ it to Mike just now.

Our city will be one of the cleanest areas in our country in the 21st century._____ shouldn’t be any doubt about it now.

The students in Class 3 planned to sell old books to _______ money to help the new student.