The new education system is said to be _______ to the successful development of the country.
She reached the top of the hill and stopped ______ on a rock by the side of the path.
The result of the experiment was very good, _____ we hadn’t expected
The heavy snow stopped the farmers ______ in the fields.
He was named Robert _____ his father by mother.
Tom kept quiet about the accident ____ lose his job.