— It is said that Mr Jin was elected headmaster of the new school.

— He is _____ hardworking that it is no surprise for him to get ______ post.

A．so a, such

B．so, such a

C．such a, so

D．such, so

An investor sold ten March stock index futures contracts. The multiplier on the contract is 250. At yesterday’s settlement price of 998.40 the margin balance in the account was computed as $ 86450. Today the index future had a settlement price of 1000.20. The new margin amount is:（）

A. $90950.

B. $86000.

C. $81950.