________ is known to all is that effective measures should be taken to deal with the problem of the overexploitation of our resources.
下列划线字注音全都正确的一项是( )
The Big Ben, _______ we visited during a recent trip to Britain, is one of London’s tourist attractions.
It was Mr. Zhang that helped us out of the trouble. Without his help, we ______ it so easily.
下列句中加粗的词语解释有误的一项是( )
