单项选择题
She claims to be very learned in biochemistry, but in fact（） she knows about it is all sadly out of date.
A. so little B. that much C. what little D. how much
单项选择题 After years of research, Charles Drew devised a procedure for preserving plasma（）
单项选择题 Ploughs and other agricultural implements were （）on display at the recent exhibition.
单项选择题 His strange behavior had greatly（）me and my friends as well that evening.
