The professor might have managed to find out the working principle of the toy bird if __________.
举一反三
- They are afraid that other people might find out ______.
- Corey said his time working with the professor was the most rewarding experience he had ever had in his life, far ________ anything that he might have dreamed of or imagined.
- The police ______ the evidence last time, but they did not. A: must have found out B: should have found out C: must find out D: could find out
- ______they have been working hard to find? A: Is that what B: Is that C: It is that D: Is it that
- We have conducted a ______ to find out which product people find most interesting.