Maria has to baby-sit．That’s＿＿＿ she can’t come out with us．
| A．why | B．how | C．when | D．what |
–Did you see ____ English teacher?
--I saw him at ____ work in the office just now.
| A．an, / | B．the, a | C．the, / | D．the, the |
When ____ a new word, you’d better _____ a dictionary.
| A．come across, refer to | B．coming across, consult |
| C．coming across, look up | D．come across, look through |
After the quarrel, I tried all my best to fix the misunderstanding between us, but all my efforts seemed ______.
| A．in trouble | B．in case | C．in time | D．in vain |
- Better get down to your work, Jack.
--- _____________.
| A．It’s my pleasure | B．Not to mention it |
| C．Mind your own business | D．You’re welcome |
I met him very late on Friday night, ______, early Saturday morning.
| A．at the latest | B．on the whole | C． in a word | D．or rather |