1 . 我祖父经营他的诊所已经50多年了。(since)
It has been more than five decades ________________________.

2 . 人们将不再担心缺乏能源，因为我们将会主要依赖太阳能及风能。
People will not worry about lacking energy any longer ________________．

3 . Although you are discouraged now, I hold the belief that if you wear a smile, the reward will be amazing.
→ ________________, I hold the belief that if you wear a smile, the reward will be amazing.(倒装句)

4 . It was hot at night, but we slept soundly because we were so tired after a long journey.
→________________, we slept soundly because we were so tired after a long journey.(倒装句)
→ ________________, we slept soundly because we were so tired after a long journey.(让步状语从句)

5 . 吉米虽然是行家，但他也无法超越罗布，罗布不需要太空服，还有四条腿和一身钢铁肌腱。
Jimmy, ________________，couldn’t outrace Robutt, who didn’t need a spacesuit, and had four legs and tendons of steel.

6 . 如果一个人在事故中受了重伤，你最好把他留在原地。
If a person is badly injured in an accident, you’d better leave him ________ he is.

7 . 在我看来，学生应该多听多说，以便能培养他们的沟通技巧。
As far as I am concerned，students should do more listening and speaking________________.

8 . 每当你惊慌失措的时候，你最好深呼吸，试着放松自己。（every time引导时间状语从句）
________________, you’d better take a deep breath and try to relax.

9 . 当我说，在水下深三十英尺的地方，可以像在大白天一样看得清楚，人们会相信我吗？
Shall I be believed when I say that, at the depth of thirty feet, I could see ________________?

10 . 虽然人类主宰了这个世界，但我们不能违背自然规律，否则我们会受到大自然的惩罚。(while)
________________, we should not violate the laws of nature, otherwise we will be punished by it.