This summer vocation I am going to do a lot of _________ to prepare for the senior high school.

____ the machine, the engineers paid much attention tothe noise from it.

In our daily life, everyone fails every now and then.It is how you react that makes a_______.

China is seeing ______ growing trend in the number of people owning pets and ______ recent survey finds that one in 13 Chinese now keep animals.

The reform has changed the whole nation. It cannot remain _________ it used to be.