Although the scientific community had hoped that the field of transplantation ……………., the shortage of organ donors has curtailed research.

The seed heads of teasel plants raise the nap on coarse tweed cloth ……………. than do the machine tools invented to replace them.

We are all amenable ……………… discipline.

……………. unknown quantities is the task of algebra.

I read two books but neither book …………….. very interesting.

The yearly path of the sun around the heavens ……………..

This table is already ……………..

A dolphin ……………. a porpoise in that it has a longer nose.

The …………….. I’m late is that I missed the bus.

…………… like "Macdonalds" and "Kentucky fried chicken" have used franchising to extend their sales internationally.