Clone science should be developed to benefit human beings___________

单选题Clone science should be developed to benefit human beings____________ harm them．

A．more than
B．other than
C．rather than
D．none other than

1While Maggie, a white-collar worker, was at home after work, she ____________ doing something to doing nothing．

A．like
B．favor
C．tend
D．preferr

2___________ the 1500s ____________ the first European explored the coast of Califomia．

3When required by their teacher to take notes in classes, some students only do so ____________