Year 3 Students in our school _______ all kinds of exercises every day in the past eight months. A. kept busy doing B. keep busy with doing C. were kept busy doing D have been kept busy with
I was really too busy with my homework and I couldn't help ____________ housework.
Mary is one of the brightest students who_________ from New York University.
Mary is short__________ her brother is very tall.
--Whose advice do you think I should take? --___________.
__________ you understand the rule, you will have no further difficulty.