―What’s the matter? You look worried and restless.
―Oh, nothing really serious. As a matter of fact, I ______ of my graduation thesis. I have to hand it in soon.
A．a(chǎn)m just thinkingB．just thought
C．have just thoughtD．was just thinking
D
考查動詞的時態(tài)與語態(tài)。從會話可知，答話人是在解釋他look worried and restless 的原因，因為他（剛才）是在思考畢業(yè)論文的事，這是說話前的那個時刻正在發(fā)生的事情。故應(yīng)用過去進行時描寫正在進行的動作。
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