“ Please” and “Thank you” are _____words , when you speak to others .
— Do you know mother giant pandas have only one or two babies ___________?—Sorry, I don’t know.
—Is this maths problem ___________?—Yes, I can work it out ___________.
—___________does your sister walk her dog ?— Once a day.
—Would you like to climb the hill with us tomorrow?—If it ___________,I___________.
— I bought a nice MP3 yesterday. It’s only$150.—Oh, really? I spent ___________ money than you .Mine is $120.