18. All members are required to complete the health information form prior to______ in any summer program.
(A) participate
(B) participates
(C) participated
(D) participating

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統計： A(2), B(0), C(0), D(0), E(0) #2753567

詳解 (共 1 筆)

#6462613
正確答案是： (D) particip...
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