阅读下列句子，在空白处填入1个适当的单词或括号内单词的正确形式。
【小题1】He experimented with different styles of painting, but was most famous for his work in Cubism, which often uses acute angles and ______ the world is represented as being constructed of cubes and rectangles.
【小题2】By popular consensus, this is the most valuable painting in the world—it is impossible to calculate what price it would fetch if it ever ______ (come) on the market.
【小题3】Unfortunately, although van Gogh committed his whole being to painting, he received little reward ______ his effort.
【小题4】As a teenager, he began painting scenes of local fishermen and sailors along the canals in Suzhou, ______ sold these paintings to tourists and passers-by as souvenirs.
【小题5】We can use old pieces of cloth as brushes, or wrinkle the cloth together to ______（form） an interesting pattern.
【小题6】That is, the main criterion for ______（include）is that the film must not be financed by Hollywood studios.
【小题7】It was then that Robert Redford became its sponsor and changed the focus to independent films, often ______（make） on very modest budgets.
【小题8】______ on such a trip can you gain a better appreciation of European art.