The scientist knew nothing about the matter, because he was always ______ himself in his study.
| A．burying |
| B．devoting |
| C．focusing |
| D．concentrating |
I can guess you were in a hurry. You ______ your sweater inside out.
| A．had worn | B．wore |
| C．were wearing | D．are wearing |
--- Have you finished the report?
--- No. I ______ it all this week.
| A．will do | B．had done |
| C．have done | D．have been doing |
--- I beg your pardon, but I didn’t quite catch you.
--- Oh, I ______ myself.
| A．am talking to | B．talked about |
| C．have talked to | D．was talking to |
He ______ at the meeting, but his heart attack prevented him.
| A．will speak | B．is going to speak |
| C．had to speak | D．was going to speak |
Remember to send me a photo of us next time you ______ to me.
| A．are writing | B．will write |
| C．has written | D．write |