The writer emphasizes the 
importance of being completely honest with friends, and that’s ____ I personally disagree.
| A．what | B．which | C．where | D．how |
The stretches of mountains are the natural _____ between the two countries.
| A．position | B．barrier |
| C．regulation | D．approach |
—Look! So many people are gathering before the store.
—_______ They are waiting to buy an iPhone6.They are really iPhone fans.
| A．So what? | B．How come? |
| C．Guess what? | D．What for? |
We've all got both light and dark inside of us. _______ matters is the part we choose to act on, and that's who we really are.
| A．That | B．Which | C．Those | D．What |
I know Benson graduated from a famous university and has a PhD, but the fact remains _______ he has no practical experience.
| A．when | B．whether |
| C．why | D．that |
The result of the research is not _______ a team of doctors expected to see, but it actually has a positive effect on cancer treatment.
| A．the one | B．one | C．it | D．that |