Do you know we have much difficulty ____ the work on time..
| A．on finishing | B． finishing | C．to finish | D．at finishing |
The US auto (汽车) industry, a symbol of the American spirit, narrowly escaped a sudden breakdown, _____ China has become the world’s top automaker.
| A．when | B．while | C．but | D．although |
— _________ Betty this morning?
— Not yet, but she is sure to be here before noon.
| A．Did you see | B．Will you see | C．Do you see | D．Have you seen |
--- Where is Jack? I can’t find him anywhere.
--- He ______ his homework upstairs.
| A．might have done | B．must have done | C．might be doing | D．must do |
—I’m sorry I broke the glass.
—_____.
| A．I see | B．No problem | C．Forget it | D．You’re welcome |
Saying “hello” to somebody today can _____ a new friend tomorrow.
| A．hand in | B．result in | C．lie in | D．lead in |