How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?
| A．when | B．since | C．before | D．until |
He has collected ___ six hundred dollars.
| A．as many as | B．so many as | C．so much as | D．as much as |
-- _____ the letter on your way to office.
--O K. I _______.
| A．Don’t forget posting; will | B．Do remember to post; will |
| C．Do forget to post; do | D．Do remember posting; do |
The news finally came, which _____them all!
| A．disappoints | B．disappointing | C．disappointed | D．disappoint |
He has done a job which is _____as the one I have done.
| A．as well | B．as good | C．as better | D．so best |
_____it is to jump into the water in hot summer!
| A．What fun | B．How funny | C．What a fun | D．How fun |