这起事故必须仔细调查。译文：________________________________. A: The accident must investigated carefully B: The accident must be investigated carefully C: The accident must investigating D: The accident must be investigating

The police are _______ the murder. A: examining B: investigating C: inspecting D: searching

No____ no right to speak. A: investigation B: investigate C: investigating D: investigated

Only in recent years have tools been available for investigating nuclei in any detail.

5.The police are investigating a ________ of attacks in the area. A: series B: way C: size D: several

When target market research is conducted, factors related to the country may well be worth investigating, including:

The questions globally competent students ask and explore can make them fully involved in investigating the world.

Their study included 128 subjects who already were part of a ( ) study investigating risk factors for depression.

Scientists have spent years_________ into the effects of certain chemicals on the human brain with no results. A: studying B: investigating C: researching D: inspecting

Scientists have spent years into the effects of certain chemicals on the human brain, but with no result.（） A: studying B: researching C: investigating D: inspecting