There___(be)a set of keys on the table.

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There___(be)a set of keys on the table.

There___(be)a set of keys on the table.
There___(be)a set of keys on the table.

There___(be)a set of keys on the table.
There is a set of keys on the table.
桌子上有串儿钥匙.

is

is 是一套钥匙 用单数

is

is

填(Is)。 there be 遵循就近原则,像a set/pair of就看做单数,(一串)。不必让of 后的复数单词影响判断,这种情况 都填is 。