Two professors at Harvard University published a study of 3,300 new graduates, looking at ______ their names had any bearing on their academic performance.
Scientists in some countries have done a lot of work to _____ the moon.
She does not know _____ the situation, for she is too inexperienced.
I know these flowers are not natural, but the _____ ones look more beautiful and can last long.
Cattle’s two ____ help them to digest food and their fur to keep them warm. A stomaches B heart C stomachs D hearts
Great attention must be paid ____ welfare, especially in the poor area.