—John has put forward _______ most challenging question for us to answer.
—Yes, it really is. I have never heard _______ harder one.
| A．the; 不填 | B．不填; the |
| C．the; the | D．a; a |
Is it true that light travels in a straight line and never ______ it hits something that reflects it.
| A．turns; until | B．bends; unless | C．breaks; when | D．changes; until |
You have to keep on learning if you want to keep ______ with the development of modern science and technology.
| A．peace | B．touch | C．pace | D．connect |
Go about your business your own way. Don’t _____what others think or say.
| A．care for | B．care about | C．care with | D．care of |
It might be very difficult to find the ____ of the information.
| A．cause | B．resource | C．source | D．course |
Even though she has many ______, I _______ any less.
| A．faults; don’t fond of her | B．shortcomings; don’t love her |
| C．errors; don’t like her | D．mistakes, am not fond of her |