_____ the flight to Beijing will be delayed is _______ I’m especially worried about.
| A．If; what | B．Whether; that | C．When; that | D．Whether; what |
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 |