David was always ______ his best in any danger, but at that moment he froze.
| A．at | B．in | C．for | D．on |
--__________ was it_________ they discovered the entrance to the underground place?
--Totally by chance.
| A．How; that | B．What; that | C．When; when | D．Where; that |
The amount of money ______for the seriously sick child was soon collected.
| A．to need | B．needed | C．needing | D．which needed |
Their tent, __________ light as a feather, remained firm in the storm last night.
| A．as if | B．even | C．though | D．if |
--The news is spreading from mouth to mouth.
--Yes, it has become__________ talk of__________ town.
| A．a; a | B．the; 不填 | C．the; the | D．a; 不填 |
Why haven't you finished your homework yet? You ___________ to have finished it by last Sunday.
| A．are supposed | B．were supposed |
| C．are supposing | D．were supposing |