英语的基本语调有：______升调和______

单项选择题—How much vinegar did you put in the soup —I'm sorry to say, ______. I forget. A. no B. no one C. nothing D. none

单项选择题He is only too ready to help others, seldom,（）,refusing them when they turn to him.

A. if never
B. if ever
C. if not
D. if any

单项选择题—The weather is too cold（）March this year. —It was still（）when I came here years ago.

A. for colder
B. in cold
C. in hot
D. for hotter

单项选择题We hope to go to the beach tomorrow, but we won't go（）it's raining.

A. if
B. when
C. though
D. because

单项选择题Stop making so much noise（）the neighbor will start complaining.

A. or else
B. but still
C. and then
D. so that