Hello,
i absolutely need your help !

You have to choose between present perfect progressive or present perfect be + ing.

- Godfrey (think) about his dilemma for quite a long time.
- Godfrey (want) to become a squire since he was eight.
- Guinevere and Lancelot (always / love) each other.
- Ched (eat) cheddar cheese : he still has some in his whiskers.

Thank

- has been thinking

-  has wanted

- have always loved

- has been eating

Explanation:

Both tenses express an action that started in the past and is still ongoing or just completed. However, we use Present Perfect to talk about completed actions or to emphasize the results of these actions. On the other hand, we use Present Perfect Progressive to emphasize duration, or the continuous character of some action.

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.