1 . The bikes even has a motor, ______ can help with high hills or at times when few kids on it. (用适当的词填空)

2 . 我发现所有学生的注意力都集中在那张图片上了，没人在听我讲课。这让我很恼火。

I found all my students’ attention ________ on the picture and no one paid any attention to me, ________ upset me greatly.

3 . 几个月之后，瑞恩筹集了那2000美元，用这些钱在乌干达的一所小学附近建造了一口井。(“介词＋关系代词”引导的定语从句)

After several months, Ryan had raised the $2,000, ________________ near a primary school in Uganda.

4 . 我们从温哥华出发，在那儿我们取到我们这次旅行的交通工具——一辆房车。(where引导非限制性定语从句)
We started from Vancouver, ________________.

5 . Grass skiing is a rising form of entertainment, popular with young people, ___________focus is on the adventurous and enjoyable form of a sports activity.

A．who

B．when

C．where

D．whose

6 . 我痴迷于篮球，并且打得相当好，这或许就是我们上次比赛失利时我如此生气的原因。(定语从句和表语从句)
I’m crazy about basketball, and pretty good at it too, ________________ when we lost our last match.

7 . In this case, cool evening air is a slightly different temperature than the solar cell in the panel. That becomes energy, ________is transformed into electricity.(用适当的词填空)

8 . 食物的芳香充满着卧室，这好像很神奇地变成世上最可爱的地方。（汉译英）

9 . 他演讲中的一些与气候有关的话语让听众感到惊奇。(which) (汉译英)

10 . 他们这一辈子都投入到了建设乡村的事业中，这使得他们备受尊敬。(devote以及非限制性定语从句)(汉译英)