Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

He was overconfident. Therefore, he ruined our plan completely.

A. It was his overconfidence ruined our plan completely. 

B. He was overconfident, which ruined our plan completely. 

C. That he was overconfidence ruined our plan completely. 

D. It was because his overconfidence that ruined our plan completely.

Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.

Question 14: The exquisite antique bottle was carved _____ marble.

A. by

B. from

C. at

D. about

Một xí nghiệp kí hợp đồng dệt một số tấm thảm len trong 20 ngày. Do cải tiến kĩ thuật, năng suất dệt của xí nghiệp đã tăng 20%. Bởi vậy, chỉ trong 18 ngày, không những xí nghiệp đã hoàn thành số thảm cần dệt mà còn dệt thêm được 24 tấm nữa. Tính số tấm thảm len mà xí nghiệp phải dệt theo hợp đồng.