The police ____ still not sure ______ the young man killed himself or was killed.

The police ____ still not sure ______ the young man killed himself or was killed.

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is, if

is, whether

are , whether

are, that

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They  are some pens,some books       some cards.

#57403

and

but

Although he was will,          his father came back.

#58113

but

and

—— Hurry up. The bus is coming! —— Oh, no, we mustn’t cross the street ______ the traffic lights are green.

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after

since

when

until

____ he was very tired, he didn't stop to have a rest.

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But

Because

Although

--- What did the man say to you?--- He asked ________ I knew the way to the museum. But I didn’t know.

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that

when

where