was talking with my monitor when a fight ________between the students of the two classes.[ ]

The mother,as well as her two daughter,__________to the theatre withsome friends this evening.

Nowadays food safety is a big problem and nobody can guarantee all foods are safe to us, but food produced in the normal companies is____better

MrSmith is said to have retired and he is living in the country now.—- YesHe ________ in our factory for 35 years! What a good worker!

The argument remains extremely heatedthere are necessary conditions of existence such as water on the Mars.