— How do you like the new book?
—To be honest, it is a little difficult________.
| A．understood | B．being understood |
| C．understanding | D．to understand |
The flowers were so lovely that they __________ in no time.
| A．sold | B．had been sold | C．were sold | D．would sell |
“Goodbye, then,” she said, without even ___________ from her book.
| A．looking down | B．looking up | C．looking away | D．looking on |
Some pre-school children go to a day care center, __________ they learn simple games and songs.
| A．then | B．there | C．while | D．where |
Between the two generations, it is often not their age, _________ their education that causes misunderstanding.
| A．like | B．as | C．or | D．but |
—Can’t you read the sign, sir? No parking here!
—_____.
| A．You’re welcome | B．Go ahead | C．Pardon me | D．Thanks, anyway |