The first person to __________ the idea of nuclear fission ...

[ Adverbial Clause / If / Comparatives ]

The first person to __________ the idea of nuclear fission was a Hungarian physicist named Leo Slizard.

A. go out with

B. catch up on

C. come up with

D. fill up with

Select your answer:

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Present Perfect Tense › View

_____________your Dad __________ the letter yet?

A. Have/sent

B. Has/ send

C. Has/ sent

D. Have/ send

Vocabulary › View

Alibi

A. to give emphasis or prominence to

B. an excuse, especially to avoid blame

C. examined or perused carefully

D. a beat or throb, as of the pulse