You will only be successful in improving (3) .................... English, however, if you work hard and (4) .................. speaking English as much as you can.

Let me tell you what I think you should do. (advice)

This matter is so complicated that we don't know how to deal with it.

So .............................................................................................................................................................................................. .

"Why don't you leave now. That's what I'd do."

If ............................................................................................................................... .

Penny took three exams and managed to succeed them all.

Items of luggage whose weight exceed 50 kilograms will not be allowed on the ferry.

The numbers of cars on the roads must be reduced. (down)

For each of the sentences below, write a new sentence as similar as possible in meaning to the original sentence, but using the word given. This word must not be altered in any way.