_____it was late , she went on working.
| A．Though | B．Because | C．Since | D．Whether |
Not knowing his address , she had some difficulty ________ his house.
| A．finding | B．to find | C．found | D．find |
Everything comes with ________price; there is no such _______ thing as free lunch in the world.
| A．a , a | B．the , / | C．the , a | D．a , / |
---- Flight 551 for Dallas ________. I must be off now.
------Have a pleasant trip then.
| A．is being announced | B．has announced | C．was announcing | D．had been announced |
Near the table ________ a poor dog, who desired to satisfy his hunger with something _________ fell from the table.
| A．laid; which | B．lay ; that | C．laid ; that | D．lay ; what |
After more than ten minutes’ break, the speaker _________ the story from where he left off.
| A．kept on | B．went on | C．made up | D．took up |