Check your test paper carefully so as not to make any mistake．

Man often accuses nature for his own misfortunes．

There are five cases of food poisoning in the hospital．

Jane was writing a letter and meanwhile Pat was watching TV．

They’ll be here soon．Meanwhile we’ll have some coffee．

We must work hard to acquire a good knowledge of English．

Gradually we acquired experience in how to do the work．

The students concentrated in the sportsground waiting for the start of the sports．

The industrial development is being concentrated in the west of the country．

We should concentrate all our efforts on improving education．