阿摩線上測驗
40. When Anita woke up and found her baby boy gone, she assumed that he ______ to one of the places they went to yesterday.
(A) must return
(B) must to return
(C) must have returned
(D) must be returned
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統計： A(44), B(5), C(78), D(32), E(0) #706350
統計： A(44), B(5), C(78), D(32), E(0) #706350
