--Will you go to Tina’s birthday party?--No. ______ invited, I can’t go. I’ll be very busy then.
She ____________ the path as the trees around her became thicker.
Once ________ more attention, the little trees could have grown better.
After ten hours’ operation, the doctors managed to _____the one-year-old twins at the head.
It remains______ whether the medicine has side effect.
New reports say peace talks between the two countries have ____with no agreement reached.