The back garden of our house contains a lawn ，（） very pleasant to sit on in summer.

Toobtainasatisfactoryresult，onemustapplytwo（）ofpaintonacleansurface.

The minister of finance is believed _____ of imposing new taxes to raise extra revenue.

The back garden of our house contains a lawn ，____very pleasant to sit on in summer.

It is not uncommon for there _____ problems of communication between the old and the young.