something that needs great mental or physical effort in order ...

[ Vocabulary ]

something that needs great mental or physical effort in order to be done successfully

A. easy

B. challenge

C. win

D. hard

Select your answer:

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Grammar › View

If we didn’t any measures to protect whales, they would disappear forever.

A. use

B. make

C. take

D. do

Phrasal Verbs › View

I really like Joe’s dad but I don’t get ____ with his mother at all.

A. out

B. by

C. on

D. through