【C6】
A．on
B．for
C．as
D．in
请帮忙给出正确答案和分析，谢谢！
I’m a business trip for APEC summit, sir.A、onB、forC、in
You can ask these experts __________advice in job hunting？A、onB、forC、over
A．calling onB．calling forC．calling offD．calling in
【C2】A．SinceB．ForC．AsD．In
A．onB．inC．asD．near
【C6】A．uponB．forC．asD．to
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