8. a) Match the highlighted words in the texts with their definitions. 1) board - (v.) to get on a bus, boat, train, or plane.
2)
(adj.) very full of people.
3)
(n.) the taste of a particular type of food or drink.
4)
(v.) to consider or study something carefully and decide
how good or bad it is.
5)
(n.) how thick or smooth a liquid is.
6)
(v.) to begin to employ someone.
7)
(n.) the way food or drink tastes or feels in your mouth.
8)
(n.) the time when a lot of people are travelling to or
from work and so roads and trains are very busy.
9)
- (n.) a qualification given for completing a university

Here are the matching definitions for the highlighted words in the texts:

1) board - (v.) to get on a bus, boat, train, or plane.
Definition: To step onto a bus, boat, train, or airplane to travel.

2) crowded - (adj.) very full of people.
Definition: When a place is filled with a large number of people, making it difficult to move around freely.

3) flavor - (n.) the taste of a particular type of food or drink.
Definition: The distinct taste that a specific type of food or drink has.

4) evaluate - (v.) to consider or study something carefully and decide how good or bad it is.
Definition: To analyze or assess something thoroughly in order to determine its quality or value.

5) viscosity - (n.) how thick or smooth a liquid is.
Definition: The measure of a liquid's thickness or its resistance to flow.

6) hire - (v.) to begin to employ someone.
Definition: To give someone a job or employ them for a position or task.

7) texture - (n.) the way food or drink tastes or feels in your mouth.
Definition: The characteristic physical feel or consistency that food or drink has when consumed.

8) rush hour - (n.) the time when a lot of people are traveling to or from work and so roads and trains are very busy.
Definition: The period during the day when there is heavy traffic due to a large number of people commuting to work or returning home.

9) degree - (n.) a qualification given for completing a university program.
Definition: An academic qualification awarded to students upon successful completion of a course or program at a university.