quick

他思维敏捷，总能迅速理解复杂的概念。

His ___quick mind helps him grasp complex ideas fast.

请尽快回复这封邮件。

Please give a ___quick reply to this email.

我们快速吃了午饭然后回去工作了。

We had a ___quick lunch and went back to work.

她是我们班学得最快的学生。

She is the ___quickest learner in our class.

我的新电脑比旧电脑快多了。

My new computer is much ___quicker than the old one.