用所给词的适当形式填空。

1. He is now in the __________ (sit) room

2. It's very __________ (friend) to say "Hello" to others.

3. He is not good at__________ (swim), but he is a good _________ (climb).

4. The black shoes are__________ (make) of leather.

5. I don't know what___________ (wear)?

6. These cards are old. I don't want to buy_________ (their).

中国历史上，少数民族建立的 * * 重视农业生产的表现有   

①编订《农政全书》推广农耕技术 （明朝） ②在北方地区推行均田制和租调制（北魏）  

③颁布《授时历》指导农业生产（元朝）  ④督令官员，劝课农桑（传统重农政策：清朝、北魏，元朝）

A．①②③

B．①③④

C．②③④

D．①②④