In February, Chinese tech company Huawei____Mate X，afoldable（可折叠的）5G mobile phone.
A. is introducing B. introduced C. introduces D. was introduced
In February, Chinese tech company Huawei____Mate X，afoldable（可折叠的）5G mobile phone.
A. is introducing B. introduced C. introduces D. was introduced
B
【解析】
句意“在2月，中国科技公司华为介绍了Mate X，一款可折叠的5G手机”。A.现在进行时；B.一般过去时；C.一般现在时；D.一般过去时的被动语态。根据In February可知，用过去时，排除A和C；且主语Chinese tech company Huawei与谓语introduce之间为主动，故选B。