单项选择题
The poor old man was______yesterday when he was crossin...
单项选择题The poor old man was______yesterday when he was crossing the street.
The eastern part of Australia is______in climate to the...
单项选择题The eastern part of Australia is______in climate to the western part.
Scientists in the world are expected to find a(n)______...
单项选择题Scientists in the world are expected to find a(n)______ to the problem of overpopulation.
