Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Câu 1: There are different hundreds of species of butterflies in Cuc Phuong National Park.
A. There are
B. different hundreds of
C. species of
D. in
Câu 2: It is imperative that these materials send to the director immediately.
A. is
B. send
C. the
D. immediately
Câu 3: Across the country, exam results have improved by an average of eight percentage.
A. Across
B. exam results
C. by
D. percentage
A.
B.
C.
D.