6)    A examples       B estimates        C evidence     D evaluation

7)   A would take       B had taken      C was taking   D would have taken

8)    A decades        B centuries        C dozens      D years

9)    A this            B these          C it           D what

10)   A plain           B historic        C single       D eventful

11)   A now that        B so that         C as          D when

12)   A however       B but             C and        D therefore

13)   A scope         B sphere          C scale        D stretch

14) A therefore       B hardly          C accordingly   D therefore

15)   A line          B circle           C diagram      D curve

16)   A fit           B like            C resemble      D parallel

17)   A about        B only            C more than     D less than

18)   A in           B at              C on           D for

19)   A as           B had             C if           D with

20) A in addition     B in turn