答案是b,c.
there is a light and two pens .这句话谓语是is是因为根据there be 结构的就近原则,谓语须和最近的名词保持一致is 和a light 保持一致,而不是和 a light and two pens保持一致.所以有are 都错.至于you can see 不用倒装是因为句首没有表示否定意义的副词,如only,never 等 never shall i forget that day.所以 On Jane’s desk you can see a light and two pens.也是对的.