Somesolidevidenceprovesthatwat

Some solid evidence proves that water really exists on Mars, but unfortunately, there is still no of life.

A．mark

B．sign

C．symbol

D．signal

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相关试题

---Do you know the Frenchman?
---Yes. I ______him for two years.

A．know

B．have known

C．knew

D．have been known

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They______ all their money, so they have to walk home.

A．spend

B．had spent

C．have spent

D．will spend

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Great changes_______ in the city, and a lot of factories_______.

A．have been taken place, have been set up	B．have taken place, have been set up
C．have taken place, have set up	D．were taken place, were set up

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---When did Kate’s grandma die?
---While the doctors______ on her.

A．are operating

B．were operating

C．operate

D．operated

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---Who are you looking for?
---Mr White.
---Wait here for a while. The class meeting_______ over in half an hour.

A．is

B．will be

C．was

D．has been

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