—Robert 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 |
Not only________to turn off the lights in the kitchen，but we also failed to lock the front door.
| A．we forgot | B．forgot we |
| C．did we forget | D．we did forget |
Our country is developing at an amazing speed，which is________makes me feel so proud.
| A．what | B．why |
| C．that | D．where |
—What do you know about Bill Gates?
—As far as I know，when he was a child，he showed a________of interests in everything around him.
| A．series | B．variety |
| C．good deal | D．large amount |
What impresses me most is________he appears in front of others，he wears a sincere and charming smile.
| A．what | B．which |
| C．that where | D．that whenever |
Only by improving education and high science technology can a country become a(n)________one.
| A．advanced | B．bored |
| C．astonished | D．convinced |