__________ my love of landscape, nothing could persuade me to spend another day in the Highlands
A. But for
B. For all
C. Above
D. Except for
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In no circumstance __________ .
A. smoking should be allowed on the campus
B. should smoking b allowed on the campus
C. should smoking allowed on the campus
D. should smoking allow on the campus
原胶原肽链的一级结构具有重复排列的三肽序列，其三肽序列中的第一个氨基酸残基几乎总是()。
A. 脯氨酸
B. 赖氨酸
C. 甘氨酸
D. 亮氨酸
Although Jack made a foolish mistake, we __________ at him
A. ought to have laughed
B. oughtn’t to have laughed
C. ought to laugh
D. should not to laugh
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