（    ）30．--Do you know him well?

--Sure，We ______ friends since lo years ago．

A．were                      B．have made              C．have become          D．have been

（    ）29．We could see nothing because the lights suddenly ______．

A．went on                 B．went over               C．went down             D．went out

（    ）28．I really don't know ______ about it．

A．what to do                                                B．how to do

C．to do what                                                 D．how can I do

（    ）27．They used to ______ wood ______ paper．

A．using，making                                          B．use，making

C．use，to make                                            D．using，to make

（    ）26．--You seem to like sweets．

-- ______．That's probably why I'm becoming fatter and fatter．

A．So I do                  B．So do I                  C．So am I                 D．So I am

（    ）25．--Do you often get on ______ line?

--Yes．I ______ most of my spare time on it．It's a good way to kill time．

A．cost                       B．spend                     C．pay                        D．take

（    ）24．--What ______ it be? Can yon guess?

--It ______ be a box，for it is moving．It ______ be a car．

A．can，can't，must                                       B．can，can，must

C．Can，mustn't，must                                  D．must，mustn't，can

（    ）23．Taiwan ______ China from ancient（古代的）times．

A．is belong to            B．belongs to              C．is belonged to          D．belongs

（    ）22．If I ______ you，1 would give some flowers to her．

A．am                        B．was                       C．were                      D．are

（    ）21．Tom pretended ______ his homework when the teacher came in．

A．to be doing            B．to do                     C．do                         D．doing