Nowadays more and more people regard traveling as part of their life, and Chinese transport has been strengthened for the holiday travel ____.
| A．agent | B．diploma | C．dilemma | D．boom |
No matter how frequently _____ the works of Beethoven always attract a large number of people.
| A．performing | B．performed |
| C．to be performed | D．being performed |
I heard that you really had a wonderful time at John's birthday party, _____?
| A．didn't I | B．didn't you | C．hadn't you | D．will you |
Modern science and technology has _____ communication between people far apart.
| A．made convenient | B．made it convenient |
| C．made it convenient for | D．made it convenient to |
Under no circumstance _____ to tell lies to parents.
| A．children are allowed | B．are children allowed |
| C．children will allow | D．will children allow |
The professor said he could talk on _____ interested the audience.
| A．any topic | B．which topic |
| C．whichever topic | D．the topic he thought it |