hard
- I found ____ hard to get out of bed on cold winter mornings.
- Scientists are working hard to make _______ possible for people to live on Mars in the future.
- I find hard to learn English well.
- Study hard, and will be difficult.
- _____is too hard _____ a good solution to this problem.
- I find hard to get on with him.
- I found ___________ hard to remember all the twelve star signs because they are difficult to pronounce(发音) and spell.
- I found ____ hard to get out of bed on cold winter mornings.
- Scientists are working hard to make _______ possible for people to live on Mars in the future.
- I find hard to learn English well.