1 . Advances in virtual reality and wearable tech, as well as the f________ (柔韧、易弯曲的) battery, mean we should soon be seeing further developments. （根据中英文提示填空）

2 . Li Bai and Du Fu were two of the greatest poets in Chinese history, who ________ (钦佩) each other and quickly became friends after they met. （根据汉语提示单词拼写）

3 . Under Qian’s o________（杰出的） leadership, China’s rocket science developed greatly. （根据中英文提示填空）

4 . Yes, but how do I know if I have s________（足够的） detail? （根据中英文提示填空）