Mary didn’t go to John’s birthday party because she ________.A. wasn’t invited B. didn’t invite C. isn’t invited
—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.
— Why don’t we go swimming tomorrow?—__________ .