25．There is an obvious __________ between the cultures of the West and East.
| A．content | B．contrast | C．contract | D．Contact |
He is so busy. He cannot afford enough time with his son ______ he wants to.
| A．even if | B．as if |
| C．because | D．unless |
--- Did you find the missing couple in the mountain yesterday?
--- No, but we _______ to get in touch with them ever since.
| A．have tried | B．had tried |
| C．have been trying | D．had been trying |
I haven’t seen Sara since the last time we met on her graduation ceremony, and she has changed beyond _______.
| A．sense | B．strength |
| C．measure | D．recognition |
She was so _______ that she wouldn’t give in until she received a full apology.
| A．simple | B．lucky |
| C．stubborn | D．proper |
As ______ matter of fact, the beauty of ______ nature there made an excellent impression on me.
| A．the; a | B．/; the |
| C．a; / | D．a; the |