Choose the best answer.

They ______ a lot of trees around their houses, so their neighborhood looks greener now.

Choose the best answer.

The local authority should ______ more money in improving the quality of their local products so that they can be exported to other countries.

Choose the best answer.

After the flood in 2020, many people ______ their hometown and ______ to big cities to find jobs.

Choose the best answer.

He ______ his report on the city planning, so he can have free time and relax now.

Find the mistake.

He worked very hard when he started this course in order to he could achieve good results.

Choose the best answer.

Social media ______ is one of the social issues that many people are concerned about.

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Some parents are worried about their children’s ______ when they go online too much but rarely communicate with their parents face-to-face.

Choose the best answer.

Tom: Can you tell me why these buildings were built?

David: ___________.