What would have happened ________, as far as the cliff?
| A．if Bob has walked farther | B．if Bob should walk farther |
| C．if Bob had walked farther | D．if Bob walked farther |
No matter how healthy you ________ be, you need to consult a doctor from time to time.
| A．should | B．will | C．must | D．may |
Many dog owners treat their pets like human beings, ________ if they do not have children of their own.
| A．absolutely | B．especially |
| C．eventually | D．extremely |
I really don't know how to thank you, but for your help, I ________ my lost necklace.
| A．couldn't have found | B．mustn't have found |
| C．couldn't find | D．wouldn't find |
After ________ seemed an endless wait, it was her turn to enter the interview room.
| A．what | B．why | C．that | D．how |
I'm a bit green at ________ video editing, so it takes me ________ long time to edit these things.
| A．the; a | B．/; a |
| C．the; / | D．/; the |