--Does he always keep an appointment, Jenny'?
-- Seldom, ______.
| A.if any | B.whenever possible | C.if ever | D.when necessary | 
—Grace, when shall we take a walk?
  —After I finish________ the dishes.
| A.wash | B.washing | C.washed | D.to wash | 
I really wonder____ he has posted me many parcels_____ we didn't work together.
| A.how ,after | B.why, when | C.when, before | D.why, since | 
— How come a simple meal like that costs so much?
  — We had ______in your bill the cost of the cup you broke just now.
| A.added | B.included | C.contained | D.charged | 
The black horse is___________ of the pair.
| A.the strongest | B.the stronger | C.the strong | D.quite strong | 
He’ll accept the job _______the salary is very low. After all he needs money.
| A.unless | B.if not | C.though | D.so long as |