After supper she would sit down by the fire, sometimes for ____ an hour, thinking of her young and happy days.
| A．as long as | B．as soon as | C．as much as | D．as many as |
But for your timely warning, we ___have been unaware of the danger. Thank you very much!
| A．shall | B．must | C．will | D．would |
___some of the juice and perhaps you’ll like it.
| A．Trying | B．To try | C．Try | D．Having tried |
The question that puzzles them is ___they can finish the work on time.
| A．what it is that | B．what is it that | C．how is it that | D．how it is that |
My father ____ a bus to his office until the workers have had his car fixed next week.
| A．has taken | B．is taking | C．had taken | D．took |
Be sure to make the invitations sent to ____ has taken part in the competition.
| A．who | B．whom | C．whoever | D．whomever |