When exposed to stress, in ________ form, all of us react both chemically and physically.

Did you spend 20 dollars ________this computer game

You should be working instead of _________ there inbed.

How did it _____ that you failed to _____ in time yesterday?

When asked why he prefers bikes to buses, the professor said, “Riding a bicycle takes __________ half an hour, but it’s more convenient and environmentally friendly ”