Choose the best answer to each of the following questions.

Study after study has shown that nature improves human health and well-being, ________?

Choose one word in A, B, C, or D to complete the following sentences.

Someone who is _______ is hopeful about the future or the success of something in particular.

Choose one word in A, B, C, or D to complete the following sentences.

The medical community continues to make progress in the fight against cancer.

Choose one word in A, B, C, or D to complete the following sentences.

Instead _____ petrol, cars will only run ____ solar energy and electricity.

Choose one word in A, B, C, or D to complete the following sentences.

He regretted________ killed and eaten several rare species.

Choose one word in A, B, C, or D to complete the following sentences.

The local authorities were blamed________ ignored the pollution issues in

the area.

Choose one word in A, B, C, or D to complete the following sentences.

Don't forget to write to me soon,_______?

Choose one word in A, B, C, or D to complete the following sentences.

Everyone's going to be there, _______?