填介词She said she had a really hard time ___science this semester.为什么?补充问题:with,in,at在修饰课程(如science,math)时,有什么不同?

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填介词Shesaidshehadareallyhardtime___sciencethissemester.为什么?补充问题:with,in,at在修饰课程(如science,math)时,有什么不同

填介词She said she had a really hard time ___science this semester.为什么?补充问题:with,in,at在修饰课程(如science,math)时,有什么不同?
填介词She said she had a really hard time ___science this semester.为什么?
补充问题:with,in,at在修饰课程(如science,math)时,有什么不同?

填介词She said she had a really hard time ___science this semester.为什么?补充问题:with,in,at在修饰课程(如science,math)时,有什么不同?
with

in

in