EXERCISE OF TOEFL STRUCTURE

1. In 1066, a bright comet_______in the sky attracted much attention. (A) was appearing (B) appears (C) it appeared (D) appearing

2. In the Stone Age, stone tools ______ with other rock materials. (A) polishing (B) they polished (C) for polish (D) were polished

3. The first steamship to cross the Atlantic_____Savannah, in 1819. (A) was the (B) it was the (C) the (D) in it the

4. The first plant-like organisms probably____in the sea, perhaps three billion years ago. (A) life (B) living (C) lived (D) it was living

5. The president ______ the election by a landslide. (A) won (B) he won (C) yesterday (D) fortunately

6. When______ the conference? (A) the doctor attended (B) did the doctor attend (C) the doctor will attend (D) the doctor's attendance

7. The Brooklyn Bridge_____ thirteen years to complete. (A) In New York (B) Is in New York (C) It is in New York (D) Which Ney York

8. The sound produced by an object ______in a periodic way involves more than the simple sine wave. (A) It vibrates (B) Vibrating (C) Is vibrating (D) Vibrates

9. The drastic decline of the beaver helps to illustrate what_____to the ecosystems of the North American continent. (A) Happening (B) The happening (C) Has happened (D) About happening

10. If calcium oxide remains exposed to air,_______to calcium carbonate. (A) Turning (B) Turns (C) It turns (D) The turn