Plants and trees need water to grow; ______, friendship needs our heart and passion to develop.

We ________ fight against pollution.

The young mother often _________ her child alone at home.

Jenny hopes that Mr Smith will suggest a good way to have her written English ________ in a short period [ ]

Though the price of gas has gone up a lot since November 2010, the man doesn’t it at all, for he has a well-paid job.