Unit5 Grammar預習檢測單項選擇1. We should care more about our health ____ good health is the first step towards success.A. so B. because C. but D. if2. Wang Dong didn’t go to school yesterday ____ he was ill. A. so B. if C. because3. Some of the students are nearsighted ____ they spend too much time watching TV or playing online games. A. when B. though C. because D. unless4. ____ everyone is here, let’s begin our meeting. A. Though B. Since C. Before D. So5. ____ Daniel can draw very well, he will design the posters for the show. A. Although B. When C. As soon as D. As6. —What shall we do now?—____ it’s raining hard, let’s stay at home.A. So B. Since C. Though D. If 7. We can talk with friends on the Internet ____ it’s easier and cheaper.A. though B. as C. orD. but 參考答案及解析1. B句意:我們應該更多地關心我們的健康,因為身體健康是走向成功的第一步。so意為“所以”;because意為“因為”;but意為“但是”,表轉(zhuǎn)折;if意為“如果,即使”。2. C句意:昨天王東沒有去上學,因為他生病了。表示原因,用because。3. C句意:一些學生近視是因為他們花費太多的時間看電視或者玩網(wǎng)絡游戲。when意為“當……時”;though意為“雖然,盡管”;because意為“因為”;unless意為“除非”。4. B句意:既然大家都來了,咱們開始開會吧。since意為“既然”,符合句意。5. D句意:因為丹尼爾繪畫很好,所以他將設計演出的海報。as有“因為”的意思,符合句意。6. B答句句意:由于正在下大雨,我們待在家吧。since意為“既然,由于”,符合句意。if引導的是條件狀語從句,不符合題意。7. B句意:我們可以在網(wǎng)上與朋友們聊天,因為它既容易又便宜。as用作連詞可以表原因;though意為“雖然”,or意為“否則”,but意為“但是”,都不符合句意。