Question 83. The more tired you are, the least hard you can concentrate.

A. more tired                B. you are                     C. least hard                  D. concentrate

Question 82. Geothermal energy is energy to obtain by using heat from the Earth’s interior.

A. energy                      B. to obtain                   C. using                        D. the Earth’s

Question 81. Weather and geography conditions may determine the type of transportation used in a region.

A. Weather                   B. geography                C. type                          D. used

Question 80. Dams are used to control flooding, provide water for irrigation, and generating electricity for the surrounding area.

A. to control flooding   B. irrigation                  C. generating                D. surrounding area

Question  79:  In  that  age  of  computers,  it  is  difficult  to  imagine  how  tedious  work  of  accountants  and clerks must have been in the past.

A. that age                    B. it is                           C. work                         D. have been

Question 78: It is a good idea to be careful in buying or purchasing magazines from salespersons who may come to your door.

A. It is                           B. to be                         C. or purchasing           D. from salespersons

Question  77:  Foreign  students  who  are  doing  a  decision  about  which  school  to  attend  may  not  know exactly where  the choices are located.

A. doing                        B. about which             C. to attend                   D. the choices

Question 76: The symptoms of diabetes in the early stages are too slight that people do not notice them.

A. The                           B. too                            C. do not                       D. them

Most advanced countries have (compulsory) education
A. considerable
B. required
C. elaborate
D. high powered

The main argument in the report is ___________correct
A. primarily  
B. up to a point  
C. fundamentally  
D. supposedly