题目内容
20．-Who's that girl reading in the garden？Is it Maria？-It ________ be Maria．I saw her on the playground a moment ago．（ ）
| A． | mustn't； run | B． | shouldn't； to run | ||
| C． | may； ran | D． | can't； running |
分析 --在花园里看书的那个女孩是谁？是玛丽亚吗？
--不可能是玛利亚．刚才我看见她在操场上跑步．
解答 答案：D．考查情态动词及过去进行时态．句意"--在花园里看书的那个女孩是谁？是玛丽亚吗？--不可能是玛利亚．刚才我看见她在操场上跑步．"．第一个空，否定句中表示有一定依据的推测，用can't．第二个空，see sb doing sth看见某人正在做某事．因此用动名词running，答案是D．
点评 考查情态动词．此题要结合语境，选择情态动词的适当用法．还要掌握过去进行时态，这一知识点．
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