Câu hỏi: By the mid-nineteenth century, land was such expensive in large cities that architects began to conserve space by designing skyscrapers.

A. By the mid-nineteenth century

B. such expensive

C. conserve

D. by designing

Câu 1: His health gets good and better because he does gymnastics regularly.

A. good

B. because

C. does

D. regularly

Câu 2: She has disappeared three days ago, and they are still looking for her now.

A. has disappeared

B. and

C. are still

D. for her

Câu 3: Minh Hanh, who is one of the most famous fashion designers in Vietnam, are preparing for a new show.

A. who

B. the most

C. fashion-designers

D. are

Câu 4: Because they had spent too many time considering the new contract, the students lost the chance to lease the apartment.

A. because

B. too many

C. considering

D. to lease

Câu 5: Bells told people of happy events, such as weddings and born or, sometimes had to announce unpleasant events such as a death

A. born

B. had to

C. unpleasant

D. events

Câu 6: The workers went on strikes because of they thought their wages were low.

A. on

B. because of

C. thought

D. were