When he suddenly ( ) up the subject of genetic engineering, there was an embarrassed silence.
举一反三
- The silence was suddenly broken when a large car, with its headlights on and its horn blaring, roared down the arcade.
- When he stood up from his seat, he suddenly felt an pain in the lower part of his back. A: intense B: intensive C: strong D: tense
- He _____(walk) to his car when he stopped. He suddenly _______(remember) that he _______(not lock) the door.
- He was so enraged that he ripped out a curse when a journalist asked about the reported scandal. A: to tear away violently B: to produce, display, or utter suddenly C: to subject to violent criticism or attack D: None of the above
- 基因工程抗体（genetic engineering antibody）