4 From the expedition he wrote a book about Central Africa.

a) returning; b) having returned; c) to return; d) to have been returned.

5. However hard he tried he could not stop about it.

a) to think; b) to be thinking; c) thinking; d) to have been thinking.

6. She felt somebody her gently by the hand.

a) to touch; b) touch; c) touched; d) to have touched.

7. The boy was made his story twice.

a) repeat; b) repeating; c) repeated; d) to repeat.

8. She didn’t seem his unfriendly tone.

a) to have noticed; b) to notice; c) being noticed;

4. to have been noticed.

9. Do you mind these photos again ?

a) seeing; b) having seen; c) to see; d) to have seen.