Not until the early years of the 19th century ________ what heat was. [ ]A.

题型：贵州省期中题难度：来源：

Not until the early years of the 19th century ________ what heat was. [      ]
A. man did know
B. did man knew
C. didn"t man know
D. did man know

答案

举一反三

The computer was used in teaching. As a result, not only _______, but students became more interested
in the lessons. [ ]
A. saved was teachers" energy
B. was teachers" energy saved
C. teachers" energy was saved
D. was saved teachers" energy

题型：陕西省期中题难度：| 查看答案

Only when he reached the teahouse ______ it was the same place he"d been in last year. [     ]
A. he realized
B. he did realize
C. realized he
D. did he realize

题型：同步题难度：| 查看答案

— It"s nice. Never before ________ such a special drink!
— I"m glad you like it. [     ]
A. I have had
B. I had
C. have I had
D. had I

题型：同步题难度：| 查看答案

Only after they had discussed the matter for several hours ________ a decision.[ ]
A. they reached
B. did they reach
C. they reach
D. do they reach

题型：同步题难度：| 查看答案

Not until he left his home ________ to know how important the family was for him.[     ]
A. did he begin
B. had he begun
C. he began
D. he had begun

题型：同步题难度：| 查看答案