scientists
- Scientists are working hard to make _______ possible for people to live on Mars in the future.
- Many scientists say that it’s important for us to have ______ food in our diet.
- Scientists are working hard to make _______ possible for people to live on Mars in the future.
- Many scientists say that it’s important for us to have ______ food in our diet.
- The scientists ________ on the new medicine for two years. They will succeed in no time.
- It’s said that scientists have ________ a way to deal with the serious disease
- Most scientists seem to agree that ________ certain limit should be set on ______sale of cars to ease air pollution.
- _____ scientists could make clones of human beings?[ ]