[ Mixed General Quiz ]
Red cells, white cells and plasma are ___ in blood.
a. find
b. found
c. founded

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Grammar - Verb Forms › ViewZoe _____________________ this grammar point to me twice, but I still don’t understand it.
A. has already explained
B. has already been explaining
C. already explains
D. have already explain
Grammar › View
They hope they …all the tenses by the times the exam comes.
A. Will have mastered
B. Will have been mastered
C. Will have master
D. Will have been mastered
Tenses › ViewMy father …….. the door for 3 hours.
A. repaired
B. will repaire
C. has repaired
D. is repairing
Grammar › View
The children usually ____ a sandcastle on the beach
A. build
B. are building
C. built
