An advertisement is useful in ________ it lets customers know of the kinds of goods in the shops.
| A．that | B．which | C．what | D．whether |
I’d like to live somewhere ____ the sun shines all year long.
| A．which | B．that | C．where | D．in which |
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
——How much vinegar did you put in the soup?
——I’m sorry to say, ____. I forget.
| A．no | B．no one | C．nothing | D．none |
We hope to go to the beach tomorrow, but we won’t go ____ it’s raining.
| A．if | B．when | C．though | D．because |
Stop making so much noise ____ the neighbor will start complaining.
| A．or else | B．but still | C．and then | D．so that |