He started to learn English in 1990 and in the years ________ he kept on using it in his work.
Let’s have another look, ___?
I __ brushing my teeth twice a day.
Dr, Robert Bell went to New York , bought some books ___ his daughter.A. visiting B. to visit C. and visited D, visited
His cousin will stay in Beijing till his aunt ___ well.
I’ve thrown away my old trousers, I’ll have to buy ___.