Earning money by collecting rent from tenants (房客) is easy and happy, but that’s not ________ we study for.

Bears fatstores throughout the summer and fall to have energy enough to last themthrough their winter sleep.

I’m sorry to hear that you failed your driving test, ______ luck next time.

The film “Taking Tiger Mountain by Strategy” is , so it is welcomed by people.

It’s difficult for the village children to cross the river for school. — I think a bridge ________ over the river.