1. The sun___ behind the clouds. APPEAR. 2. I promise to___ the vase that I'd broken. PLACE. 3. The foreigners are difficult to understand because they___ many Russian words. PRONOUNCE. 4. Life would be unrecognizable without difficulties to__ COME. 5. They__the crucial importance they attach to these goals. LINE

1. The sun appears behind the clouds.
The verb "appear" means to become visible or to be seen. In this sentence, it is describing the action of the sun becoming visible or showing itself behind the clouds.

2. I promise to place the vase that I'd broken.
The verb "place" means to put or to set something in a particular position or location. In this sentence, it is describing the action of putting the vase back in its original position after it was broken.

3. The foreigners are difficult to understand because they pronounce many Russian words.
The verb "pronounce" means to make the sounds of a word or language. In this sentence, it is explaining that the foreigners are hard to understand because they don't correctly produce the sounds of many Russian words.

4. Life would be unrecognizable without difficulties to come.
The verb phrase "to come" means to occur or happen in the future. In this sentence, it is stating that life would be completely different or unrecognizable if there were no future challenges or problems to face.

5. They line the crucial importance they attach to these goals.
The verb "line" means to arrange or place things in a straight series or order. In this sentence, it is saying that they arrange or organize the crucial importance that they give to these goals in a specific order or series.