A. even if B. as though C. only if D. regardless of
单项选择题Under no circumstances （） leave his post.
A. a soldier mustn't B. a solider must C. mustn't a soldier D. must a solider
单项选择题（）got in the wheat than it began to rain heavily.
A. No sooner had they B. No sooner have they C. No sooner they D. No sooner they had
