发展科学技术和培养人才的基础是
—Is this red bag yours? —No, it isn’t. is that black one.
Mom, I like green T-shirt. Could you buy it for me?
—Is your headache getting _______? —No, it’s worse.
—Which is your new neighbour, Liu Hua? —The man _______ T-shirt is red.
—Do you know _______ the Capital Museum? —Next Friday.