As nobody here knows what is wrong with the machine, we must send for an engineer to _________ the problem.
---You didn’t lock the back door. ---You are wrong. I ______.
If you don’t know what you want, you might _______ getting something you don't want.
I have ______ many different friends ______ it is hard to choose just one best friend.
I would really appreciate ______ if you can make time in your schedules to attend my lecture today.
---Do you know the person our headmaster is talking to. ---Yes. I made his _______ at a party.