I (keep) ______ up correspondence with him since he went abroad.have kept自从他出国,我

游客2023-10-05  11

问题 I (keep) ______ up correspondence with him since he went abroad.

选项

答案 have kept

解析 自从他出国,我们一直保持着通信联系。此句考查动词的时态。
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