According to the new law, the people found _______ illegal advertisements on the street will be punished　severely.

A．put up	B．putting up
C．to put up	D．having put up

(2015·天津) Only when Lily walked into the office_________that she had left the contract at home.

A．she realized	B．has she realized
C．she has realized	D．did she realize

Only then ______ to answer violence with violence.

A．we decided	B．we did decide
C．decided we	D．did we decide

_______both sides accept the agreement __________ a lasting peace be established in this region.
A. Only if; will   B. If only; would
C. Should; will    D. Unless; would

Only after talking to two students__________that having strong motivation is one of the biggest factors in reaching goals.

A．I did discover	B．did I discover
C．I discovered	D．discovered I

Only by increasing the number of doctors by 50 percent _________ properly in this hospital.

A．can be the patients treated	B．can the patients be treated
C．the patients can be treated	D．treated can be the patients