He must have been working really hard these days. This morning, I even noticed ______ behind his ears.
As the ________ of Thomas Edison shows, a child who typically questions the most common facts may turn out a genius as a grown-up.
It was your lie about your education background ________ cost you the opportunity to get the job.
Male nurses are not ________ are needed most, but female doctors are.
The wild flowers looked like a soft orange blanket the desert.
Many of the scientists and engineers are judged_______ how great their achievements are.