North Korea threatens to ________ from six-party talks aimed at ending North Korea's nuclear program unless its proper rights are to be satisfied.
Life is a race ________ people gain growth and experience through cooperation and competition.
The stadium which is being built in our city for the next Asian Games will be _____ the old one.
—The luggage is too heavy for me to carry.—You can have someone strong enough_______ you a hand.
No matter how __________ she brushed the old pot, she could not make it completely clean, which made her very upset.
—Do you know this city very well?—Yes. I ________ here for five years. It’s nice to be back again.