解析 B [分析]句意:我可以问之前你是否来过中国吗?what什么;if是否,如果;how怎样;have/has been to+地点名词,表示曾经去过某地,去了并且回来了;have/has gone to+地点名词,表示去了某地,还没有回来。before之前,问的是是否之前去过中国,即去了并且回来了,所以用have been to,是否用if,故选B。
7. -What ___ Mr. Black before he came to China?-He___(teach) math in a high n a high sch8. -What is the boy doing?-He 相关知识点: 试题来源: 解析 【答案】did;do;taught【核心短语/词汇】teachmath:教数学【翻译】布莱克先生来中国之前是做什么的?他在一所高中教数学。【解析】根据...
Before long we set about looking for a home in Yucca, Arizona, a very small town of less than 1,000 people. When I called to inquire about the property, I was informed that there was no electricity available in ...
718.Tu Youyou, a committed and patient scientist, was born in Ningbo, China, on 30 December 1930, and graduated from Peking University Medical School in 1955. 屠呦呦,这位尽职尽责、锲而不舍的科学家1930年12月30日出生...
We'd never been to China before.So my parents booked us a(1)___in Beijing.Then I decided to buy my father a book called China:Know Before You Go. "Looks very interesting,but we don't(2)___that." he said.How(3)___he was! Our first evening...
what before he came to China?-He ___(teach) h in a high the-What is the boy doing?(do) his home 相关知识点: 试题来源: 解析 【答案】teaches【核心短语/词汇】teach教【翻译】他在一所高中教数学。【解析】teach教,动词,在句中作谓语。根据句意,判断本句是一般现在时,主语是he,是第三人称...
百度试题 结果1 题目China is not it was before A. that B. what C. whether D. how 相关知识点: 试题来源: 解析 B 反馈 收藏
(化合物) called 2-nonenal. The compound is a byproduct of other chemical breakdowns and sends out a “greasy” or “grassy” odor as the molecules (分子) exit the skin and are released into the air. Researchers disc...
S. totaled $36.5 million. Yet, CAR's exports to America were a paltry $1.4 million, leaving a $33.6 million deficit. If CAR were to apply the same "reciprocity" formula as the United States, it would impose a 1,200 percent tariff on U.S. goods. But what actually happened was ...
When Xi took office as the general secretary of the Communist Party of China Central Committee in 2012, environmental pollution was one of the most common complaints among the public. At the start of that year, a river in Guangxi Zhuang Autonomous Region reported cadmium pollution, endangering ...