They haven’t seen each other for ten years, but they still keep in___contact with each other.
Want to type faster? Just come to our school to have more ________.
A month’s ______ is required from whichever party wishes to end the agreement.
He was ______ medical student before he turned _______ engineer.
He’s so ill that his father has to send for _______ doctor.
The price of _______ bike will partly be determined by the sort of ______ material used.