Re: Qs from 1000 SC
42. Answer is C - likely... to plan on practising (is preffered) over likely... in planning to practice (idiomatic error). None of the other options have a better solution than C has.
43. Answer is D - pattern of changes (is singular) should have indicates (singular) and not indicate (plural). Finally, the more idiomatic expression is - descendant of, not descendant from.