[ Passive Voice ]
This problem …. by your brother yesterday
A. was solved
B. will be solved
C. is solved
D. solves

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Grammar › ViewIn his free time, Tuấn …….. the Internet. He is interested in ancient cities.
A. surf often
B. surfs often
C. often surf
D. often surfs
Grammar › View
Read and complete: I’ve _____ the Himalayas.
A. Climbed
B. Climb
C. Climbing