Although each TV series will be rated on the basis of its usual content, the ratings can _____ from week to week

We ______ the seminar sponsored by you in September last year.

—Why didn ’t you buy a new car?

—I would have bought one if I _______ enough money.

This offer is ____ your reply reaching us before May 5th.

The newspaper will have to close down if it cannot increase its ________ considerably.

This is ________ good reading habits are not only an important study skill for the student, but also an important life skill for anyone.

He found _______ difficult to study maths.

This is our best price, ____ which we have concluded many orders with other buyers in your city.( )

Don’t trust everything ________ you have read in the newspapers.

As to the various pollutions,which of the following is NOT true?