| 661 | Had he arrived earlier, he _____ the train. | would have caught |
| 662 | It is essential that she _____ on time. | arrive |
| 663 | Let bygones be _____. | bygones |
| 664 | Assure vs "ensure": "ensure" means: | To make certain |
| 665 | To be a couch potato means: | To be lazy and inactive |
| 666 | To go to the dogs means: | To deteriorate |
| 667 | She is proficient _____ English. | in |
| 668 | Change to passive: "She looked after the baby." | The baby was looked after by her. |
| 669 | Identify the preposition: "The cat jumped off the roof." | off |
| 670 | To be worth one's salt means: | To be worth one's salary |