_____ you choose to contact us, you can expect our efficient and helpful service.
\_\_\_\__ you choose to contact us, you can expect our efficient and helpful service.
matter
We must begin testing the instrument no matter _____ difficult it is.
We must begin testing the instrument no matter \_\_\_\__ difficult it is.
_____ the manager will come or not doesn’t matter much.
\_\_\_\__ the manager will come or not doesn’t matter much.
Don't open the door, no matter ________ comes.
Don't open the door, no matter ________ comes. A