The scientists ______ the mystery of the double helix, the scope for genetic engineering d

__________ the calculation is right, scientists ？

After the first experiment, the scientists believed that______.A．Rico could figure out the

She wanted to join the group of men______was to explore the mysteries of the planets.A．who

How the fire in the dancing hall started ______ a mystery.A.to remainB.remainsC.remainD.is

How the fire in the dancing hall started _________ a mystery.A. to remainB. remainsC.

The detective and his assistant have begun to ________ the mysterious murder. A) c