The first ____ appeared during the last period of the dinosaurs' reign. The earliest medicines ____ from plants of various sorts. Simple sails were made from canvas ____ over a frame. Pluto's moon Charon ____ in a slightly elliptical path around the planet. Techniques of breath control form an essential part of any ____ program to improve the voice. Robert E. Lee ____ to the Confederate Army of General Grant in 1865 at the Appomattox Courthouse. The pituitary gland, which is ____ the brain, releases hormones to control other glands. At around two years of age, many children regularly produce sentences ____ three or four words. Multinational companies ____ it increasingly important to employ internationally acceptable brand names. The cornea is located under the conjunctiva, on ____ of the eye.

TOEFL Grammar Practice

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