This is an important problem _______ too few social scientists have researched.

I don ’t mind _______ the decision as long as it is not too late.

The conclusion from the study is not definite; it is just ________.

It is not decided ________ the conference will be held.

Johnson was ________ unknown before running for the presidency.

Children have a natural ________ about the world around them.

―________ fine day it is today!

The volunteers would rather go by train than ________.

There is a growing body of evidence to support the fact that most people suffer from a lack of daydreaming _______ an excess of it.

The engineer ______ my father works is about 50 years old.