志愿者组织是最重要的也是最有争议的自愿性工具。（    ）

需求量变化与需求变化的含义是相同的。

要推进（    ）的新型城镇化，加快农业转移人口市民化。要把促进有能力在城镇稳定就业和生活的常住人口有序实现市民化作为首要任务。

按照货币的法定支付能力的不同，货币可分为（ ）

协调和调和是一回事。

In order to make proper reservations, will you send your acceptance to the attention of the General Office ______ a week before that day？

共产主义社会，生产力的高度发展，消灭了三大差别，包括工农之间、（    ）、脑体力之间的差别。

Henry, who works in a company, invites Mandy, his colleague, to take a picnic with him.

Henry: Hey, what are you doing this weekend?

Mandy: I    1    yet. What about you?

Henry:    2    to go for a picnic? 1 The weather forecast says it will be sunny this Sunday.

Mandy: That's a good idea    3    anything?

Henry: Yes, of course, and   4    make some hamburgers.

Mandy: OK. Then I'll bring some drinks, green tea, black tea, juice or cola?

Henry: How about    5    ? By the way, I will bring my new kitchenware for our picnic.

Mandy: New kitchenware? A cooker?

Henry: Yeah! I just bought a solar cooker last month. It's a new device that uses solar energy and it is getting popular due to its high efficiency and its environmental friendliness. People can cook easily with this new device. I'll bring some fruit and some other food. We will have a wonderful picnic!

Mandy: Wow! How amazing! I can't wait!

Henry: OK, I am    6    to our picnic! Then see you on this Sunday!

Mandy: See you!

构建开放型世界经济是高质量共建“一带一路”的基础。

下列选项中，属于领导行为理论的是（ 　）。