【B13】A．preserveB．reserveC．conserveD．contrive

【B13】A．attachB．subjectC．submitD．stick

【B13】A．fallsB．retiresC．dropsD．happens

The pillars ____ the roof of the house.A.preserveB.reserveC.retainD.sustain

【C8】A．shareB．reserveC．setD．possess

Experts say that walking is one of the best ways for a person to______ healthy.A．preserveB

To use a Chinese saying, this is "a punishment which they well______".A．serveB．reserveC．de