_____ the police thought he was the most likely one, since they had no exact proof about it,they had to set him free.
| A．As long as | B．If only | C．Although | D．As though |
Soon the hall was filled ___ people.
| A．with | B．in | C．into | D．without |
He allowed me ___ the experiment.
| A．to do | B．do | C．doing | D．did |
She was __ after the long walk.
| A．out of breathe | B．breatelessly | C．out of breath | D．having no breath |
They looked __ at the new, and some girls began to weep.
| A．sad | B．sadly | C．sadness | D．sadnessly |
Mr. Smith was very ill.The doctors said he was ___ of death.
| A．at the edge | B．at edge | C．on edge | D．on the edge |