We decided to take immediate ................................................ when we realized there was a problem.

• action

• activity

The environmental changes in the area are the result of human ................................................ .

• action

• activity

Can you ................................................ me on the best course of action to take?

• advise

• advice

He offered me some excellent ................................................ .

• advise

• advice

Diverting the course of the river will have a major ................................................ on the local ecosystem.

• effect

• affect

Frequent traffic jams in the suburbs seriously ................................................ journey times into the city.

• effect

• affect

If our teachers are ill and have to take a day off work, the college usually does its best to make ................................................ arrangements.

• alternative

• alternate

During the vacation, the college doctor is only on site on ................................................ days (Monday, Wednesday, and Friday).

• alternative

• alternate

Widening the road made an ................................................ difference to the flow of traffic.

• appreciable

• appreciative

The applause at the end of the concert was warm and ................................................ .

• appreciable

• appreciative