1£®—We'll go to the party to be held in Qinghai Grand Theater at 8 tonight. Could you join us?

—I'm afraid I can't. I ________ the holiday plan with my friends.

A£®am discussing       B£®have discussed

C£®will be discussing D£®will have discussed

2£®—Car prices have been going down sharply in the last 20 years.

—It's not surprising because the law of market ________ the price of a product.

A£®is controlling        B£®controls

C£®has controlled       D£®controlled

3£®—Look, I've got admission to Harvard University for a short­term study next semester.

—How fantastic! You ________ a different university life then.

A£®have experienced B£®will be experiencing

C£®have been experiencing        D£®will have experienced

4£® Today many physical bookstores ________ down with financial difficulties, inflexible management strategies and competitive pressure from online bookstores.