unit 3 第二课时
ⅰ.易混模块
1．a.whatb．that
(1)he telephoned mary________he wanted to see her.
答案：b 引导从句作telephoned的直接宾语，that无词义，不充当成分。
(2)this is________i want to say and that is all________i want to do.
答案：a b 第一空what引导表语从句，代词作用的连接代词，在从句中作say的宾语；第二空that引导一个定语从句，修饰all，that可以省略，在定语从句中作do的宾语。
(3)the coffee we had today was different from________we had yesterday.
答案：a what引导一个从句作介词from的宾语，作起关系代词作用的连接代词，在从句中作had的宾语。
(4)madame curie discovered________she called radium.
答案：a what引导一个从句作及物动词discovered的宾语，它作起关系代词作用的连接代词，在从句中作called的宾语。
2．a.if(if)b．whether(whether)
(1)i want to know________she has gone shopping.
(2)we wondered________that man was a spy or not.
(3)it depends on________we will be ready in time.
(4)i don't know________he won't come to the office.
(5)________he comes, i'll tell him at once.
(6)almost all people enjoy sports，________boys or girls, men or women.
答案：(1)a/b if和whether在此可以互换。
(2)b 宾语从句中出现了or not，只能用whether。
(3)b 从句作介词on的宾语，只能用whether。
(4)a 宾语从句为否定句。
(5)a if在此引导条件状语从句，意思是“如果”。
(6)b whether在此引导让步状语从句，意思是“无论……不管”，全句意思是“几乎所有的人都喜爱体育活动，无论男女老少”。
3．a.whob．whoever
(1)we haven't decided________will go to the sales department.
(2)teachers tend to like________works hard at school.
答案：(1)a who引导宾语从句，意思是“谁”，在从句中作主语。
(2)b whoever引导从句作like的宾语，相当于anyone who，全句意思是“老师倾向于喜欢在学校努力学习的学生”。
ⅱ.语法填空
1．(2015•浙江，6改编)if you swim in a river or lake, be sure to investigate ________is below the water surface. often there are rocks or branches hidden in the water.
