When introducing background information, if the content of a sentence is a general fact that is not affected by time, apply_.A．the present tenseB．the past tenseC．the present perfect tenseD．the past perfect tense
When introducing background information, if the content of a sentence is a general fact that is not affected by time, apply_.
A、the present tense
B、the past tense
C、the present perfect tense
D、the past perfect tense
发布时间：2024-11-24 14:43:21
