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He lived in London for 3 months, during ________ he picked up some English．

this

which

that

when

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This is Mr．Smith, ________ I think has something interesting to tell us．

who

whom

that

/

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The result of the experiment was very good, ________ we hadn’t expected．

when

that

which

what

选择最佳答案，完成非限制性定语从句

I, ________ your good friend, will try my best to help you out．

who is

who am

that is

what is

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Have you seen the film Titanic, ________ leading actor is world famous?

its

it’s

whose

which