刀具静止角度参考系中，与假定主运动方向垂直的参考平面是基面
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No sooner _______ home than he began to prepare the supper.
A. had she arrived
B. did she arrive
C. shehadarrived
D. she arrived
_______ working hard can we succeed in doing anything.
A. Only by
By
C. By only
D. Only
_______ she took off her dark glasses did Irecognize she was a famous star.
A. Until
B. Until not
C. Not until
D. Till
______ a good boy is he that we all love him.
A. So
B. Very
C. Pretty
D. Such
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