1.The number of Indris,arboreal,lemurlike primates,is steadily dwindling due for habitat 

                                                                                               a        b                                 c

destruction by humans.

           d

pembahasan:

key word:due

answer:due to

2.Submarines are useful the military because they are difficult to locate and,when deep

                                                  a                                      b                                                               c

under the surface,difficult to destroy.

     d

pembahasan:

keyword:useful

answer:useful to the military

3.Prior the 17th century,most lighthouses were harbor lights serving as homing beacons so 

            a                                                                   b                                      c

boats could safely find their way into port.

                                            d

pembahasan:

keyword:prior

answer:prior to

4.Stars emit energy with the form of electromagnetic radiation,which includes ultraviolet 

                  a                      b              c                                                             d

radiation,visible light,infrared,and radio waves.

pembahasan:

keyword:the form of eletromagnetic radiation

answer:by

(Bintang memancarkan energi dalam bentuk radiasi elektromagnetik)

5.Subway trains may operate in tunnels,on elevated structures,or in exclusive ways that  

                                          a                                             b                                                                  c

are separate other traffic.

                           d

pembahasan:

keyword:separate

answer:separated from(terpisah dari)

6.Advances in the art of analyzing structural behavior in the 19th century rusulted the 

                               a                                                                                                               b

demand for great civil engineering structures:dams,bridges,and tunnels.

                c                                                       d

pembahasan:

keyword:resulted

answer:resulted in

7.Since the continents formed in millions of years ago,rivers have been important geologic 

         a                                        b                                                                                                       c

forces as conveyors of water and sediment.

                                    d

pembahasan:

keyword:formed

answer:formed(v2)

tidak perlu pakai to

8.The biggest threat to automobiles is the declining supply of oily,which does not completely 

                                      a                                                                       b

stop the use of cars but makes it significantly more expensive.

                             c                                          d

pembahasan:

keyword:suplay of

answer:oil(noun)

oily:berminyak(adjective)

9.After laying eggs,a female spider carries the cocoon attached on her spinnerets.

                   a               b                                  c                                            d

pembahasan:

keyword:attacted

answer:to

10.Cobras can spray their venom by a distance of 2.4 m into the eyes of their vitims,causing 

                                         a                  b                                                                                            c      

temporary blindness and graet pain.

                             d

pembahasan:

keyword:a distance of about 2.4 m

answer:from