In the library, I found a useful book ______ how to use English grammar.
| A．to explain | B．explained | C．having explained | D．explaining |
Children are always asking all kinds of questions because they are ______ about the world they live in.
| A．curious | B．worried | C．anxious | D．careful |
It's quite necessary to be prepared for a job interview. ______ the possible answers ready will be of great help.
| A．To have had | B．Having | C．Have | D．Having had |
The traffic rules say children under the age of four and ______ less than 40 pounds must be in a child safety seat.
| A．being weighed | B．to weigh | C．weighed | D．weighing |
The audience were deeply impressed by his speech with tears _________ their eyes.
| A．to fill | B．filling | C．filled | D．to be filled |
—Johnson is indeed a wise man.
—Oh, yes. How often I have regretted ______ his advice!
| A．to take | B．taking | C．not to take | D．not taking |