16. ___________over a million different species of insects exist in the world, more than all other animal species combined.
(A) It is estimated that
(B) There is estimate
(C) That is estimated
(D) The estimate is

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統計： A(318), B(14), C(17), D(7), E(0) #613865

詳解 (共 2 筆)

#987196
It is estimated that 據估計...
3
0
#987200
combined  合計的
0
0