1.It seems oil____ from this pipe for some time,we will have to take the machine apart to put it right.

1.It seems oil____ from this pipe for some time,we will have to take the machine apart to put it right.
A.had leaked B.is leaking C.leaked D.has been leaking
2.She waved to the bride before talking her seat at the back of the church.
Before she ____________________________________.
3.They are interested in testing the effects of contemporary music on different people.
( appeal to ) _____________________________________.
4.I feel very guilty ,because I have not written to you for quite a long time.
( I feel very guilty about ) __________________________.
5.She gave us explicit directions about the way the rug should be cleaned.
She told us explicitly _____________________________________.