—Did you see the traffic accident on East Street this morning?— Yes, I _________ shopping with my friend Tina at the time.A. have gone B. am going C. was going
One way _____ this problem ______ search for some information on the Internet.
Simon is very confident. He isn’t afraid of ______ in the whole school.
Mr. Wu___this math problem____him many times, but he still doesn’t understand it.
Bob doesn’t know ________ to write about.
--How many students have passed the examination? -- _______.