1、The new president said she would _________ herself to protecting the rights of the old and the homeless, who are otherwise helpless and vulnerable.
A、dedicate
B、dedicated
C、dedicating
D、to dedicate
2、Ask your doctor whether a low-fat diet and a daily walk will ________ to reduce your high blood pressure.
A、capable
B、suffice
C、helpful
D、able
3、While advertising offers a stimulus（刺激）to buy, sales promotion offers a(n) ________ to buy, but consumers must have their own reason to buy.
A、profit
B、benefit
C、incentive
D、inspiration
4、She spent the next 10 years taking in washing, ________to pay back the money they had borrowed from the bank.
A、slaving away
B、slave away
C、to slave away
D、slaved away
5、I am assuming that you have adequate health insurance, but someone should ____________ successor to take over your financial and domestic affairs if you become unable to cope with them yourself.
A、designate as
B、be designated as
C、distribute as
D、be distributed as
