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几道用所给词的适当形式填空

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几道用所给词的适当形式填空
l(               )(not,know)what to do,he decided to ask a policeman.
On (             ) (learn) the result of the final exam,the boy decided to work harder.
Tom is not here.He(           )(go) to London on a business trip.
This small town(            )(develop) into a large city.
I(          )(read) the newspaper the whole afternoon.
The man took the money and (              )(leave) in a great hurry.
The students (           )(call on) professor Smith in his office after he (          )(return).
几道用所给词的适当形式填空
didn't know 与后面 decided时态一致
learning 前面有介词on
has gone 汤姆不在,去伦敦了 has gone人物去哪儿了
has been developed 意思是这个小镇已经发展为一个大城市
was reading 整个下午我都在读报纸,应当用过去进行时
left 有and连接前面的took,时态应当一致
called on,returned 整个句子表达的是过去发生的事情,统一用一般过去时较为妥当
顺便问一下 是高中的题吧