摘要：33．The highway through the rain forest was completed in 1990, some animal species have died off. A．by when B．since then C．since when D．by which time
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The highway through the rain forest was completed in 1990, ________ some animal species have died off．
- A.by when
- B.since then
- C.since when
- D.by which time
The highway through the rain forest was completed in 1990, _____ some animal species have died off.
[ ]
A. by when
B. since then
C. since when
D. by which time
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B. since then
C. since when
D. by which time
33．The highway through the rain forest was completed in 1990, _________some animal species have died off.
A．by when B．since then C．since when D．by which time
查看习题详情和答案>>The highway through the rain forest was completed in 1990, some animal species have died off．
A．by when B．since then C．since when D．by which time
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33．The highway through the rain forest was completed in 1990, _________some animal species have died off.
| A．by when | B．since then | C．since when | D．by which time |