16. A) It has a very long history.                  B) It is a private institution.
   C) It was founded by Thomas Jefferson.        D) It stresses the comprehensive study of nature.
17. A) They can’t fit into the machine.              B) They have not been delivered yet.
   C) They were sent to the wrong address.        D) They were found to be of the wrong type.
18. A) The food served in the cafeteria usually lacks variety.
   B) The cafeteria sometimes provides rare food for the students.
   C) The students find the service in the cafeteria satisfactory.
   D) The cafeteria tries hard to cater to the students’ needs.
Questions 19 to 22 are based on the conversation you have just heard.
19 .A) He picked up some apples in his yard.            B) He cut some branches off the apple tree.
   C) He quarreled with his neighbor over the fence.      D) He cleaned up all the garbage in the woman’s yard.
20. A) Trim the apple trees in her yard.                  B) Pick up the apples that fell in her yard.
   C) Take the garbage to the curb for her.                D) Remove the branches from her yard.