________ he is into the video game, it’s hard for him to think of anything else — all his attention is on winning the game.
| A．Unless | B．Whether | C．Once | D．Where |
–Is Bob still performing?
-I’m afraid not. He is said_________ the stage already as he has become an official.
| A．to have been left | B．to leave | C．to have left | D．to be left |
_____ in the queue for an hour,Tom suddenly realized that he had left his wallet at home.
| A．To wait | B．Have waited | C．Having waited | D．To have waited |
—How do you deal with the disagreement between the compnay and the customers ?
--- The key ________ the problem is to meet the demand _________ by the cutmoerss.
| A．to solving ,making | B．to solving ,made | C．to solve , making | D．to solve, made |
_______ is no doubt that the Rockets will defeat the Washington Wizards in the next game.
| A．It | B．As | C．That | D．There |
Lily’s mobile phone was left in a taxi accidentally, never ______ again.
| A．to find | B．to be found | C．finding | D．being found |