A.evolve
B.protection
C.operate
D.robot

A.Otherwise
B.However
C.Therefore
D.Moreover

A.If they had breakfast, they wouldn't be hungry now.
B.If they had breakfast, they would have been hungry now.
C.If they had had breakfast, they wouldn't be hungry now
D.If they had had breakfast, they wouldn't have been hungry now

A.His clothes looked clean and of good quality but they were old and worn.
B.No matter what good quality his clothes had, they looked old and worn.
C.His clothes, though old and worn, looked clean and of good quality.
D.He was fond of wearing such old and worn clothes because they were of good quality.

A.Assuming
B.Assumed
C.To assume
D.Having assumed

A.hadn't to
B.didn't have to
C.shouldn't have
D.mustn't have

A.motivator
B.motivated
C.motivational
D.motivate

A.why at that point
B.at that time
C.by this time
D.at which point

A.building a pool
B.would build a pool
C.a pool be built
D.they would build a pool

A.having informed
B.informing
C.that I informed
D.having been informed