Scientists in some countries have done a lot of work to _____ the moon.

Mum likes this old house in downtown better than the huge one in the country, but it costs almost

per is due next month, and I am working seven days ______ week, often long into______night.

It is _________ mobile phone he sent me.I’ve never seen _________ better one before.

_over everything whenever we want to make adecision, many people believe, and we will have less chance of making mistakes.