Pollution is damaging the environment, and the situation is particularly ________ in big cities.

There _______ two slices of turkey on the table and there _______ some relish on the slices.

It was ________ who respected their teachers.

The professor________ the perfect return of Shenzhou 7 in 2008______ “the most exciting thing in history” in his speech.

____ we went those days when we were in the countryside, we were warmly welcomed.