Thank you for sending us ____ fresh vegetables of many kinds. You have done us ____ a great service.
| A．不填；a | B．the；a | C．不填；不填 | D．the；不填 |
The bell ____ the end of the period rang and we had to stop our discussion
| A．indicating | B．indicated | C．to be indicated | D．being indicated |
—Where did you find the professor who made the speech yesterday？
—It was in the hall ______ the students often have a meeting..
| A．where | B．which | C．that | D．when |
Sorry to disturb you, ______ could I speak to you for a few minutes?
| A．whether | B．but | C．if | D．and |
I wasn’t interested in the film at _____ first, but after ____ time I began to like it.
| A．the , the | B．the; a | C．/ ; a | D．/ ; the |
—Tom, you the lazy bone! You left the dishes unwashed again!
—_______? Mom isn’t at home and she can’t hear you.
| A．Why | B．So what | C．For what | D．How come |