1. Answer by identifying a subject you found particularly difficult during your studies. 2. Explain why you found it challenging, such as complex concepts, heavy workload, or difficulty in understanding the material.

1. 在学习过程中，指出你认为特别困难的学科。 2. 解释为什么你觉得挑战重重，比如复杂的概念，繁重的工作量，或者理解材料困难。