1 . 他胡须浓密，头发又长又白，有时会像刚遭了电击似的竖起来。
He had a thick moustache and long white hair, __________sometimes stood on end ___________though he had just received an electric shock.

2 . 他胡须浓密，头发又长又白，有时会像刚遭了电击似的竖起来。
He had a thick moustache and long white hair, ______ sometimes ______ on end as though he _______ just ______ an electric shock.

3 . 有的人总是在公共场合大声说话，这真的是很烦人。
Some people always talk loudly in public, _____________ is really annoying.

4 . 农历九月初九的重阳节自古以来就是一个重要的节日。(fall)
The Double Ninth Festival, which ____________ since ancient times.