Answer: b

The second question:

Answer: d

The third question:

A: A.

The fourth question:

A: A.

The fifth question:

A: A.

The sixth question:

Answer: d

Question 7:

Answer: c

Question 8:

A: A.

Question 9:

Answer: c

Question 10:

A: A.

This paper investigates the usage of definite articles, copulative verbs and noun possessive cases:

Articles are function words, which cannot be used alone and have no meaning. Used before nouns to help express the meaning of nouns. There are three kinds of articles in English, one is definite, the other is indefinite and the other is zero.

The indefinite article a (an) is homologous to the numeral one, which means "one". A is usually pronounced as e before consonant phoneme and an is usually pronounced as an before vowel phoneme.