- 试题详情及答案解析
- Little_____ about A-H1N1 so far, so there is no doubt that many people are afraid when talking about the disease.
| A．did scientist know | B．scientists have known |
| C．have scientists known | D．had scientists known |
- 答案：C..
- 试题分析：句意：到现在为止，科学家们对甲型H1N1了解甚少，因此当人们谈论这种疾病时，毫无疑问充满了恐慌。否定副词位于句首，后面谓语用部分倒装， 根据后面动词一般现在时时态，得知与现在时有关，用现在完成时。排除A. 一般过去时。D. 过去完成时。故选C.。
考点：考查倒装句的用法。