________ is known to all is that effective measures should be taken to deal with the problem of the overexploitation of our resources.
Hello， is there__________ in today’s news report— Yes， of course，the terrible earthquake in Ya’an， Sichuan.
________ surprise that my first teacher,already 90, was still living and in ________ good health.
The day breaks，______ the birds are singing
The teacher speaks very loudly all the students can hear her.
