When you communicate with people, it is not unusual to find yourself in a situation ____ you have to politely decline an offer.
| A．where | B．which | C．what | D．why |
______ I admit that all these problems are difficult, I don’t agree that they can’t be solved.
| A．Unless | B．While | C．Until | D．Since |
Clothing made of man-made fibers has certain advantages over _______ made of natural fibers like cotton, wool or silk.
| A．the ones | B．one | C．that | D．what |
Believe it or not, I am sure that is _______ people call the sixth sense.
| A．what | B．that | C．which | D．how |
One’s being _______ plays an important role in building up interpersonal relations, while some rudeness will surely leave a bad impression.
| A．respected | B．respectful | C．respectable | D．respect |
There must have been something wrong with the society _______ no one offers to help those who are in trouble.
| A．when | B．where | C．which | D．that |