This is a very interesting book. I’ll buy it, _____.
| A．how much may it cost |
| B．no matter how it may cost |
| C．however much it may cost |
| D．how may it cost |
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 |
A mysterious illness, referred to as “ a typical phenomena”, has been brought under control, the government said on Wednesday, ______ no cause of it has been made public.
| A．though | B．when | C．that | D．because |