We had conducted hundreds of experiments______we finally achieved the desirable result.
A. after
B. before
C. since
D. until
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A series of pre-recorded tapes ______ already been prepared for language laboratory use by
A. have
B. has
C. will
D. had
轻便灵活，拆装方便，通用性较强，周转率高。
A. 木模板
B. 爬升模板
C. 梁模板
D. 组合钢模板
A certain tire company can produce tires at a cost of $22,500 per batch plus $9 per tire.
A. $9.00
B. $9.50
C. $11.00
D. $13.50
E. $20.00
They strongly believed that Bible was______.
A. worth to read it
B. worth reading it
C. worthy of reading it
D. worthy of being read
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