— Hi, Judy.
一 Hi, Jason. Come in. Make at home.
A:yourself
B:us
C:yourselves
词形转换。用括号内所给单词的适当形式填空,每空格限填一词。
____(lucky) , I had an umbrella, but I still got wet.
Doctors are doing research to find out what happens physically when people ________ smoking. ( )
组别
项目
水质
水量
水温
蛙卵数
孵出的蝌蚪数
A组
河水
500毫升
22℃
30个
28只
B组
蒸馏水
10℃
9只
该实验设计的不妥之处是( )