With the country’s population increasing to 1.3 billion, many of China’s rivers, including the legendary Yellow River, .

Is this the museum _____ you visited the other day?

The temperature today is 35℃ , so the birds the tree are quiet.

The laboratory ________ construction will be completed by the end of this month[ ]

ny people, paper is ________ better material, because ________process for recycling paper seems much easier.