Go and do it right now, and you _____ have my help when in trouble.
A．willB．shallC．shouldD．must
B

試題分析：句意：現(xiàn)在就去做，有困難的時候你會得到我的幫助。這里是第二人稱，表示允諾，用shall，will表示“意愿”，should“應該”，must“必須”，選B。
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