my work and life 后面接的谓语动词用单数还是复数?how difficult my work and life is (are)?

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my work and life 后面接的谓语动词用单数还是复数?how difficult my work and life is (are)?
my work and life 后面接的谓语动词用单数还是复数?
how difficult my work and life is (are)?

my work and life 后面接的谓语动词用单数还是复数?how difficult my work and life is (are)?
应该是are ,因为work和life此时共同作为主语,则为复数.

is 如果有前面有冠词类的,要用复数

is 主语是一件事 所以用单数

因为and是连接词,这时它的主语就有“work”和“life"所以应该用复数!