(2011年东北三校第一次联考)Cao Cao’s tomb is reported________in Anyang，which attracts nationwide attention.

A．being found                                       B．to be found

C．having been found                              D．to have been found

 (2011年东北三校第一次联考)If our car had not________，we would have been here on time.

A．broken out                    B．broken into

C．broken away                 D．broken down

 (2011年东北三校模拟)There are 51 students in Class Three，________failed in the test.

A．all of which                         B．all of them

C．none of whom                     D．none of them

 (2011年东北三省四市联考)—We should recycle everything we can.

—Absolutely.These may seem little things，but they’re not________it comes to saving the environment.

A．since                     B．when

C．while                    D．as

—Why do you look sad?

—There are so many problems _____. (2006年东北八校联考题)

A. remaining to settle B. remained settling C. remaining to be settled D. remained to be settled