The building ______ stone and each stone ______ more than two tons (吨).[ ]

It’s said that the famous scientist will give us _________advice on maths study. —__________good news! I’m not good at it.

After we came into the house, we found him lying on the ground with his mouth _______ and eyes ________.

___, but he still couldn’t understand the logical connection of the two subjects．

Hello, Sandy. This is Jack. What are you doing?—I’m watching a match. It started at 7:00 p.m. and _____ on for another an hour.