She is always the first staff to go to the office and the last to leave，______ I guess is why she is promoted so quickly.
| A．who | B．which | C．that | D．what |
Every member tries their best to finish the important work, ______ they aren’t permitted to go home on time.
| A．therefore |
| B．meanwhile |
| C．otherwise |
| D．somehow |
______ all of them are strong candidates, only one will be chosen for the post.
| A．Since |
| B．While |
| C．If |
| D．As |
When asked about their opinions about the schoolmaster, many teachers would prefer to see him step aside ______ younger men.
| A．in terms of |
| B．in need of |
| C．in favor of |
| D．in praise of |
Let’s learn to use the problem we are facing ________ a stepping-stone to future success.
| A．to | B．for | C．as | D．by |
—Would you like to join me for a quick lunch before class?
— ______, but I promised Nancy to go out with her.
| A．I’d like to | B．I like it. | C．I don’t | D．I will |