根据以下各句所给的首字母提示，用单词的正确形式填空，并将其完整形式写在答题卷上。
Officials attached great i________ to this incident, so they researched into the matter at once.
Because time is l_______, we should make full use of it.
Don’t worry. You’ll get f________ with everything around here as time goes by.
He spent only a few minutes giving us a b_______ introduction to the museum.
It is o_______ that people have taken measures to prevent the disease from spreading with no chickens and ducks in the market.
Students mustn’t leave the schoolyard without their teachers’ p_________.
The little boy lifted the big stone with all his s_______.
The student has b________ a lot from taking exercise such as keeping fit, being optimistic and so on.
The girl a__________ the teacher’s help very much, so she sent a card to him to express her thanks.
I will have to work e________ hours since my task isn’t completed yet.