__________both sides accept the agreement will a lasting peace be established in this region.

A．If only            B．Only if            C．unless            D．As long as

Every boy and every girl as well as some teachers who_____ to visit the museum______ asked to be at the school gate before 6 :00 in the morning.

A．are ; are          B．is; is              C．is ;are            D．are ;is

There were two boys in the lab, _______ did the experiment successfully.

A．the clever of whom                      B．the cleverer of whom

C．the cleverer of them                     D．the more clever of them

----Jack can’t concentrate on his lessons recently.

----Yes, that might _____ his low score in the last test.

A．stand for          B．apply for          C．account for        D．call for

Schools across China are expected to hire 50,000 college graduates this year as short-term teachers, almost three times the number hired last year, ____ reduce unemployment pressures.

A．helping           B．to have helped     C．to help           D．having helped

I don’t suppose Jim could have done so well in yesterday’s exam , ____________?

A．do I              B．did he            C．has he            D．could he

Due to the fact _______there is plenty to see, it would be better if you made a list before hand of ______exactly you want to go.

A．what; where       B．that ; where        C．that; which        D．which; when

The housing problems we are looking forward to seeing _______ have attracted the government’s attention.

A．solving           B．solve             C．solved            D．to solve