When taken according to the directions, the drug has no side effects.

According to Cynthia Kenyon, anti-aging drugs in the future will ______.

A．extend the average and maximum lifespan

B．be useful to test Dr Rattan's hypothesis

C．cure some diseases related to aging

D．be taken to study their side effects

A.what; when

B.that; when

C.which; when

D.when; when

A.to

B.into

C.for

D.with

A.Macbeth

B.King Lear

C.Othello

When were pulse rates taken？

A．after every exercise period

B．every day

C．after the step-tests

D．every time the ratio of active riding was increased

A.BER

B.FER

C.HO events

D.Speech coder

E.Timing advance

A.taken off

B.given away

C.put away

D.set off