______ the Atlantic Ocean crosses the equator, the trade winds cause a flow of water to the west.
The pen my brother gave me as a birthday gift _____ smoothly. I do like it.
I want to be a volunteer some day. I feel _____ is my duty to help others.
Mother kept me _____ during the summer holiday, for I failed my maths exam.
—If you don’t hurry, I’ll go without you. —_____ I’m nearly ready.
Mike resembles his mother in appearance _____ his personality follows his father's.