If the boy had _____ the dog alone it wouldn't have bitten him.
| A．set | B．left | C．had | D．put |
--- Hi Mike, are you busy now?
--- Not really. I _____ my work, and I’m going to see a movie online.
| A．did | B．have been doing | C．had done | D．have done |
________ at the party, I found Tina seated alone in the front row.
| A．Arriving | B．To arrive | C．Arrive | D．Arrived |
--- Do you mind if I record your lecture?
--- ________. Go ahead.
| A．Never mind | B．No way |
| C．Not at all | D．No. You’d better not |
My chest _______ when I make a deep breath, doctor.
| A．harms | B．hurts | C．wounds | D．injures |
--- How can I use i Phone 5s?
--- Just refer to the _________.
| A．explanations | B．expressions | C．directions | D．preparations |