Traffic over there ___________ (一直是拥挤的，无论是工作日，还是节假日).

A．Several studies have been done in the past few years.
B．Not eating breakfast does no harm to the adults’ health.
C．Adults have especially made studies in this field.
D．Eating little in the morning may be good for health.

A．In science .it is not difficult to distinguish fact from fiction.
B．Practical-minded people can understand the meaning and objectives of pure science.
C．Scientists engaged in the theoretical research should not be blamed for ignoring the practical side of their discoveries.
D．Today few people have any notion of the meaning of science.