Giải thích vì sao chọn đáp án đó 
----- Nội dung dịch tự động từ ảnh -----
Mark the letter A, B, C or D to indicate the underlined part that needs correction in each
of the following questions.
Question 31. National
grazing, as well
forests including land for animal
as wilderness areas with scenie mountains and lakes.
A including B. animal grazing
C. wilderness
D. scenic
Question 32. The discover of gold in California in 1848 led to the Gold Rush 1849.
C. led to
A. discover
B. in
Dof
Question 33. If farmers keep using pesticides as much as they do now, they would
destroy their own living source soon.
B. as much as
would destroy
D. living source
A. using
D. affects
Question 34. Mumps are a very common disease which usually affects children.
C. which
(A) are
B. very common
Question 35. Rainwater carries unused chemicals from fields into streams or lakes,
where various compounds promote the rate grown of weeds.
B. streams or lakes.
D.rate grown
A. unused chemicals
C. various compounds