课时作业1 Unit 1 Friendship
Ⅰ.单项填空
1．According to________survey，there're more and more young people who go for a walk at____ ____dusk instead of sitting in front of the computer.
A．a；the B．a；/
C．the；the D．/；/
解析：根据句意可知，本句中的“调查”并不是特指的某一项调查，所以前边用不定冠词a即可；at dusk为固定搭配，意为“在黄昏时分”，不加冠词。本句意为“根据一项调查研究(显示)，越来越多的年轻人会在傍晚散步，而不是坐在电脑前”。
答案：B
2．The p anic buying of salt reminds us that it is necessary to keep________in an emergency.
A．quiet B．calm
C．silent D．still
解析：考查形容词辨析。句意为：抢购食盐的恐慌让我们认识到在突发事件面前应当保持镇定。calm表 示“(人)镇定的，沉着的”，故B项正确。
答案：B
3．The writer often does his best to________his thoughts in his notebook every night.
A．set about B．set aside
C．set down D．set up
