Nowedays, there is a____ increase in children’s creativity,for they are greatly encouraged to develop their talents.

Mr Brown is a(n) _____ secretary in our office, for he is able to do tasks successfully, without wasting time and energy.

Children are always asking all kinds of questions because they are ______ about the world they live in.

 ___ with various research projects, that scientist can’t even find time to visit his parents.

It is not         to discuss the questions again and again.