The question is too difficult and we found ________.
| A．it not easy to answer it | B．it was not easy for us to answer it |
| C．it’s not easy to answer | D．it not easy to answer |
Mr. Obama noted that the ____ Christmas Day bombing was not the first time the group ____to attack America and its friends.
| A．advised; tried | B．attended; trying |
| C．attempted; had tried | D．wanted; has tried |
— Do remember to see a doctor tomorrow!
— ____ .
| A．Got it | B．Heard it. | C．Oh, come on | D．That’s it |
The young waiter knocked over the red wine by chance, ____ the table cloth.
| A．ruined | B．to ruin | C．having ruined | D．ruining |
So quickly are science and technology advancing ____ is a possibility today may be a reality tomorrow.
| A．what | B．that | C．what that | D．that what |
— I find it astonishing that John ____ be so rude to me.
— Not astonishing at all. He is always rude to others.
| A．should | B．must | C．might | D．ought to |