These diagrams are especially helpful when we have aconcrete problem ______ at hand.

______he was exercising at the park yesterday morning, he found a purse under the tree.

Cina, what’s your _______of being a famous singer— To practice over and over again.

Ellen was a painter of birds and of nature, _____, for some reason, had withdrawn from all human society.

With so much work filling my mind, I almost ________.[ ]