As we all know, great changes _______ in China in the past thirty years.

dney Opera house , which ________almost 900 rooms and halls of different sizes, is our first stop in Australia.

Tuantuan and Yuanyuan are little cute pandas all of us like them.

Tom is always______ for school and the teacher is very angry (生气的).

The car accident happened ____ a cold winter morning. Luckily, no one was hurt.