________ is known to all is that effective measures should be taken to deal with the problem of the overexploitation of our resources.
Scientists say it may be five or six years ______ it is possible to test this medicine on human patients.
The victims of the accident demanded that the case ______ at once.
We each took ______ tea after having ______ wonderful supper at my aunt’s yesterday.
The dress is nice but she doesn’t like the ______ on the material.
Lots of people were reported______ in the earthquake, but so far we haven’t found out the exact number yet.