正式场合不用名字称呼别人。常用头衔（医生、教授、主席）来称呼别人，除非别人不让用头衔来称呼他。
In formal situations, don’t use first ____. Always use titles (Doctor, Professor, Chairperson) until the person tells you not to.

——麦克收到他妈妈的来信了吗？
——收到了，今天早上他亲自签收的。
—Has Mike received his mother’s m____?
—Yes, he signed for it in person this morning.

热带雨林也有助于控制天气。当树木被砍掉的时候，天气变得更暖和了。另外，人类四分之一的药物来源于植物。这些植物有很多只有在热带雨林里能找到。
Rainforests also help to control the weather. When trees are cut down, it gets hotter. Besides, one quarter of our ____ come from plants. Many of these plants can be found only in rainforests.

When a car drove into it, he pulled the car out with his tractor (拖拉机) and demanded a lot of         for doing this. One day, a driver of a car said to him: “You must make a lot of money by pulling cars out of this hole day and night.”

很多科学家相信颜色能影响我们的情绪。
Many scientists believe that color can influence our m____.

托尼更喜欢他能跟着一起唱的音乐。
Tony prefers ____ that he can sing along with.

我同桌擅长记忆电话号码。
My desk-mate has an excellent ____ for telephone numbers.

海兰博物馆除了周一每天都开放。
The Highland ____ is open every day except Monday.

到目前为止，亚投行吸引了57个国家成为创始会员。
So far, the AIIB（亚投行）has attracted 57 countries to be the founding ____.

猴子被训练得像人一样能做很多事情。
The____are trained to do a lot of things like humans.