It’s good for you to _______ in class.— I think so. Thank you.

What ________ useful book ! —Yes, it is. But I found___________ difficult for me to read.

These broken pieces of plates don’t fit together, they ___________ parts of different ones.

The house ____ Lu xun used to live in is now a museum.

More and more students _________ too much homework and they are really tired of it.