The little boy _____on the mat ____ to his parents that blackbirds had _____their eggs on Mars．
| A．lay; lying; lied | B．lied; lied; lied |
| C．laid; laid; laid | D．lying; lied; laid |
Please keep us _________ of any change of address as soon as possible.
| A．Informing | B．to inform |
| C．being informed | D．informed |
Not until he retired from teaching three years ago _________ having a holiday abroad.
| A．he had considered | B．did he consider |
| C．he considered | D．had he considered |
Never before _________ seen anybody who can play tennis as well as Robert.
| A．had she | B．she had |
| C．has she | D．she has |
The manager was so satisfied with allI had doneshe gave me a promotion.
| A．that; which | B．what; that |
| C．what; as | D．that; that |
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
| A．in case | B．unless |
| C．though | D．as |