To his parents’ great joy, all their son’s years of hard work finally ____.
| A．set off | B．paid off | C．took off | D．got off |
Despite ongoing street protests, US beef ________ in South Korea due to its lower price.
| A．is sold well | B．sells well |
| C．sells poorly | D．is sold poorly |
Today many physical bookstores ________ down with financial difficulties, inflexible management strategies and competitive pressure from online bookstores.
| A．had closed | B．having closed |
| C．being closed | D．are closing |
—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 |
—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 |
—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 |