— Hi, Jack, would you like to join us in the sightseeing this weekend?—Thank you, but I regret ______ you that I can’t, for I’m going to visit my grandparents.
I am really a bit worried because I have no idea what my parents’ will be to my poor examination result.
Onlywhenonelosesfreedom _______itsvalue .
Well let you use the room ______you keep it clean and tidy .
Is thisthe research center _____you visited thelablast year ?
Don’t believe him .He is just _____ an excuse .