单项选择题

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单项选择题
What is the opening concerned in the conversation
A. Interviewing an assistant.

B. Applying for the post of assistant.
C. Recruiting an assistant.

D. Training to be an assistant.
单项选择题
You see the lightning __ it happens, but you hear the thunder later.
A. the instant
B. for an instant
C. on the instant
D. in an instant
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