—Will you give me a hand? I have some trouble_______ the scientific problem.
—Don't worry. I'll try my best to help you _______.
A．solving; in five minutes
B．to solve; in five-minute
C．to solve; after five minutes
D．solving; after five-minutes
A

試題分析：句意：你能幫我一下嗎？我不會解這道科學題。別擔心。我會在五分鐘之后盡力幫助你的。Have trouble （in） doing sth“做某事遇到麻煩”，in可以省略。In+一段時間表示“多久以后”。故選A。
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