Unless he (tell)__________us who he is , we won't let him in.
举一反三
- We asked him to tell us a few jokes, but he wasn’t in the right _______. </p></p>
- ______ he lets me use his bike, I won’t let him use my computer. A: If B: When C: While D: Unless
- If only he ______ what I tell him, but he won’t.
- ______ he comes, we won’t be able to go. A: Without B: Unless C: That D: Because
- He won't be against us in the meeting________we ask for his advice in advance. A: provided that B: unless C: what