Marco, ____, was amazed by how beautiful and powerful China was.
| A．by turn | B．in turn | C．with turn | D．in return |
Boris has brains． In fact, I doubt whether anyone in the class has＿＿＿IQ．
| A．a high | B．a higher | C．the higher | D．the highest |
Jumping out of＿＿＿＿＿airplane at ten thousand feet is quite＿＿＿＿＿exciting experience．
| A．不填； the | B．不填； an | C．an； an | D．the； the |
The warmth of＿＿＿sweater will of course be determined by the sort of＿＿＿wool used．
| A．the； the | B．the；／ | C．／； the | D．／；／ |
Paper money was in＿＿＿use in China when Marco Polo visited the country in＿＿＿thirteenth century．
| A．the；／ | B．the； the | C．／； the | D．／；／ |
Professor White has written some short stories, but he is＿＿＿known for his plays．
| A．the best | B．more | C．better | D．the most |