In vain ______ to get in touch with the Embassy.A、they triedB、tried theyC、did

游客2024-09-29  11

问题 In vain ______ to get in touch with the Embassy.

选项 A、they tried
B、tried they
C、did they try
D、they have tried

答案 D

解析 in vain句首倒装,是半倒装,正确答案是C。
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