______ the chairman of the council, the vice chairman does duty for him.
| A.Absent from | B.In the absence of | C.Present from | D.In the presence of | 
—We need to buy some summer clothes, John.
 —Oh, I never know ________when I'm in the store.
| A.what clothes should buy | 
| B.what clothes to buy | 
| C.what clothes will buy | 
| D.to buy what clothes | 
—Isn't Miss Brown here yet?
 —No.________, she's not here yet.
| A.To my much surprise | 
| B.Surprising me | 
| C.Much to my surprise | 
| D.Surprisedly | 
The temperature is high enough ________water into vapor(蒸汽).
| A.to be changed | 
| B.changing | 
| C.to change | 
| D.changed | 
There is no good for the parents to provide everything________their children.
| A.with | 
| B.for | 
| C.to | 
| D.by | 
Wait until you are________in.
| A.permitting to come | 
| B.permitted to come | 
| C.permitted coming | 
| D.permitting coming |