Choose the best answer from A, B, C or D to fill in the gaps in the following passage

Ex1. Choose the best answer from A, B, C or D to fill in the gaps in the following passage.
Speech is one of the most important (1)....................... of communicating. It consists of far
more than just making noises. To talk and also to (2)........................ by other people, we
have to speak a language, that is, we have to use combinations of (3)...................... that
everyone agrees stand for a particular object or idea. Communication would be impossible
if everyone made up their own language.
Learning a language properly is very (4)..................... The basic (5)...................... of
English is not very large, and only about 2000 words are needed to speak it
quite (6)..................... But the more words you know, the more ideas you
can (7)...................... and the more precise you can be about their exact meaning.
Words are the (8)....................... thing we use in communicating what we want to say. The
way we (9)........................ the words is also very important. Our tone of voice can express
many emotions and (10)...................... whether we are pleased of angry, for instance.
1. A. ways B. reasons C. rules D. tests
2. be examined B. be talk C. be understood D. be spoken
3. A. sounds B. languages C. systems D. talks
4. A. important B. expensive C. simple D. easy
5. A. word B. vocabulary C. grammar D. structure
6. A. good B. fluent C. well D.perfect
7. A. grow B. need C. pass D. express
8. A. most B. main C. certain D. full
9. A send B. talk C. say D. pass
10. A. asks B. understands C. knows D. shows