If you pay for the computer in cash, you could have a 5% discount; _______ we can deliver it to you for free.
--- How long have you been here? --- _____ the end of last month.
We keep in touch ____ writing often.
Who is it up _____ decide whether to go or not?
____ that they are inexperienced, they have done a good job.
Thank you for the trouble you have ____ to help me.