The Alibaba Group, _____was founded in 1999, has become China’s largest e-commerce company.
| A．what | B．which | C．whose | D．whether |
Dr. White has rich _________ in dealing with the children who have had bad _________.
| A．experience; experiences | B．experiences; experience |
| C．experience; experience | D．experiences; experiences |
With the Spring Festival coming, the _________ in the street becomes more and more delightful.
| A．air | B．surrounding |
| C．environment | D．atmosphere |
This English dictionary is expensive, but it is of ________.
| A．useful | B．great use |
| C．no use | D．useless |
Unemployment is a major cause of poverty.
| A．主修的 | B．大量的 |
| C．主修课程 | D．主要的 |
Tom gave Helen an apple in exchange for a piece of cake.
| A．交换 | B．改变 |
| C．娱乐 | D．教育 |