28. China is overpopulated, …. is worrying.

(A) that which
(B) what
(C) how
(D) which
29. Italy is …. considered as a family-oriented
country.
(A) not longer
(B) no longer
(C) not more
(D) no any more
30. Most countries …. find new solutions.
(A) are having to
(B) have have to
(C) must to
(D) must to have
31. China …. a fast-developing country.
(A) says to be
(B) is said to be
(C) is said it is
(D) it says it is
32. The elderly have to be taken care …. .
(A) for
(B) with
(C) at
(D) of
33. .… families .… before have a feeling of
cohesion.
(A) Less / than
(B) Fewer / that
(C) Fewer / than
(D) Less / that
34. Old people would like their houses ….
more comfortable.
(A) is
(B) would be
(C) to be
(D) should be
35. As he did not have enough money, he ....
live with his grandson.
(A) had to
(B) should have to
(C) must
(D) would have to

Please do your work and we will be happy to help you with corrections.

"ditto"

28. The correct answer is (D) which.

To determine the answer, we need to look at the structure of the sentence. The sentence starts with "China is overpopulated" and the blank is followed by "is worrying." Therefore, we need a relative pronoun that connects the two parts of the sentence. The most appropriate choice is "which." Thus, the correct answer is (D) which.

29. The correct answer is (B) no longer.
To determine the answer, we need to identify the correct adverb to describe the change in Italy being considered as a family-oriented country. The phrase "no longer" indicates a change or discontinuation of the previous belief. Therefore, the correct answer is (B) no longer.

30. The correct answer is (A) are having to.
To determine the answer, we need to consider the verb tense and the context of the sentence. The phrase "have to" indicates a requirement or obligation. When talking about a general truth or ongoing situation, we use the present continuous tense. Therefore, the correct answer is (A) are having to.

31. The correct answer is (B) is said to be.
To determine the answer, we need to consider the structure of the sentence. The sentence states a general belief about China being a fast-developing country. The phrase "is said to be" is used to express such general beliefs. Therefore, the correct answer is (B) is said to be.

32. The correct answer is (D) of.
To determine the answer, we need to consider the correct preposition to use with the phrase "taken care." The correct phrase is "taken care of," which means to provide assistance or support for someone. Therefore, the correct answer is (D) of.

33. The correct answer is (C) Fewer / than.
To determine the answer, we need to consider the correct comparison of quantities. The sentence is comparing the cohesion of families in the past with the present. The correct phrase is "Fewer than," which indicates a smaller quantity. Therefore, the correct answer is (C) Fewer / than.

34. The correct answer is (C) to be.
To determine the answer, we need to identify the correct infinitive form of the verb "be." The sentence requires the verb form that follows "houses" to indicate the desired state. The correct phrase is "to be." Therefore, the correct answer is (C) to be.

35. The correct answer is (A) had to.
To determine the answer, we need to consider the obligation or necessity mentioned in the sentence. The phrase "had to" indicates a requirement or compulsion. Therefore, the correct answer is (A) had to.