By the year 1889, there were just 541 bison in the whole of North America.
| A．leaving alive | B．to leave alive | C．to be left alive | D．left alive |
Charles Babbage is generally considered ___ the first computer.
| A．having invented | B． inventing | C．to have invented | D．to invent |
I send you 100 dollars today, the rest ___ in a year.
| A．follows | B．followed | C．to follow | D．being followed |
An army spokesman stressed that all the soldiers had been ordered ____ clear warnings before firing any shots.
| A．to issue | B．being issued | C．to have issued | D．to be issued |
He is ___ with the striking workers.
| A．sympathy | B．synthetic | C．sympathetic | D．sympathize |
She listened attentively while he poured out all his ____ for the future.
| A．attempts | B．congratulations | C．belief | D．ambition |