单选题 The rubbish ______ is produced every day is becoming a serious in cities around the world.

单选题 The only thing ______ interests me is the progress of my students.

单选题 All ______ is peace and progress.

单选题 They talked about things and persons ______ they had visited in Beijing.

单选题 That is the very woman ______ house was burned down last night.

单选题 The Summer Place is the desirable place ______ we long for.

单选题 Jerry is the only one ______ advice Tom might listen to.

单选题 The old town has narrow streets and small houses ______ were built close to each other.