You never know how much difficulty we had ______the problem. Luckily, we managed to solve it with Mrs Wu’s help.
| A．working out | B．work out |
| C．worked out | D．to work out |
--- Look! The plane is sending up signal “SOS”. It ________ be in danger.
| A．will | B．should | C．must | D．can |
Every morning I try ________, but I’m still late at times.
| A．not to late | B．to not be late |
| C．not to be late | D．to be not late |
— Sorry, I am late.
---- It doesn’t matter. The meeting ________ for just several minutes.
| A．has begun | B．has started |
| C．has been on | D．had been on |
It’s _________for you.
| A．so useful information | B．such a useful information |
| C．so useful a information | D．such useful information |
I didn’t see Laura at the party last night. Do you know _____________?
| A．why didn’t she come | B．what happened |
| C．when would she arrive | D．where she has been |