13、--- Shall Tom go and play football?
--- Not ________ he has finished his homework．
A． when B． if C． unless D． once
科目：高中英语 来源： 题型：
--- Shall Tom go and play football?
--- Not ________ he has finished his homework．
A． when B． if C． unless D． once
科目：高中英语 来源：2010年全国中学生英语能力竞赛（NEPCS）高一年级试题 题型：单选题
40. —Shall Tom go and play football?
—Not ________ he has finished his homework.
| A．when | B．if | C．unless | D．once |
科目：高中英语 来源：湖北八校联考 题型：014
—Shall Tom go and play football?
—Not ______ he has finished his homework.
[ ]
|
A．when |
B．if |
|
C．unless |
D．once |
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