Is this the reason _______she explained in the report for her success in the job?
| A．what | B．that | C．how | D．why |
______ for a long time, but he managed to catch up with his classmates at last.
| A．Having been ill | B．Being ill | C．He was ill | D．Though ill |
I had just finished all my homework and was about to go to bed the phone rang.
| A．when | B．until | C．while | D．before |
--- How is Dennis getting along with his work?
--- Well, he could always _______ a new idea for increasing sales.
| A．come up with | B．come about | C．come on | D．come over |
When he came to the door, my father ___ him at once although he was now a very old man.
| A．knew | B．looked at | C．recognized | D．found |
–Do you mind my smoking here?
--______.
| A．Yes, you'd better not | B．No, certainly not | C．That's all right | D．both A and B |