1. [单选题]I guess we’ve already talked about this before but I’ll ask you again just .
A. by nature
B. in return
C. in case
D. by chance
2. [单选题]The underlined word “dissolve” is used to express the idea that organic matter and minerals from soil are .
A. rushed away into the river
B. cleaned and purified by water
C. destroyed and carried away by water
D. mixed with water and become part of it
3. [单选题]The word“shoot”underlined in the 2nd passage probably means“”.
A. send for
B. move quickly
C. come out
D. grow quickly
