_____ for my illness I would have lent him a help
ing hand.
(A) Not being (B) Had it not been (C) Without being (D) Not having been
ing hand.
(A) Not being (B) Had it not been (C) Without being (D) Not having been
A.cough
B.infection
C.pain
D.illness
you should not _____ going to the doctor.
(A) put off (B) hold back (C) put aside (D) hold up
A.have a surgery
B.cure an illness
C.return to active life
D.meet a challenge
A.sickness
B.illness
C.badness
D.disease
A、Werner's syndrome is a premature aging illness, possibly caused by a defect in DNA repair.
B、Dietary restriction in mammals reduces the production of DNA damaging free radicals in the mitochondria.
C、Senescent cells in culture that have stopped dividing often express p21 and p16, proteins that are normally activated in response to DNA damage.
D、All of these facts are consistent with a model for aging based on DNA damage.