on

We can depend on Bob to make a _____ choice

He never ________ being looked on as a stupid student.

Last year ______ of new books were published on environmental protection.

They began to draft ______on labour protection.

I hadn’t seen him for years, but I ____ his voice on the telephone.

If you cannot ____ the picture hanging on the wall, step on the chair

It is impossible for us to hear everything ____ is going on in the world

Since China has entered the WTO, the ______ on foreign businesses will gradually be reduced.

The heavy rain stopped us _______ at the station on time

A large_______ of money is spent on advertisements every year.