–What do you think of Black Coal Thin Ice?–It’s a good film. it is not suitable for teen

问题补充：

–What do you think of Black Coal, Thin Ice?

–It’s a good film., it is not suitable for teenagers.

A. Instead

B. Also

C. Therefore

D. However

答案：

A. Instead

B. Also

C. Therefore

(答案→)D. However

解析：句意:你觉得《白日焰火》这部电影怎么样？-它是一部很好的电影，然而，它不适合青少年观看。instead 代替，而不是；also 也；therefore 因此；however 然而。根据句意可知，这部电影很好，是肯定的一面，后面不适合青少年观看，是否定的一面，故应表示转折。故选D。