Choose the correct letter, A, B or C. You can apply for the certificate

admin2017-04-27  8

问题 Choose the correct letter, A, B or C.
You can apply for the certificate

选项 A、only after you come back.
B、while on the trip.
C、before you leave.

答案A

解析 本题需选择时间段。和上题的certificate有关,紧接上题答案随后提到“once you have returned”,与选项A意思相匹配。
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