—Are you pleased with what he has done?—Not at all. It couldn’t be _______. Why didn’t he put more effort into his work?

_______ the children grew old, they became more and more _______ in science.

）My new friend is a ____ boy.

I feel highly         by the kind things you said about me.

—I’d like to go on a journey to Africa because I can see a lot of wild animals there.—Yes, it’s a region _____ in wildlife.