—We all had a lot of fun at the barbecue yesterday. Pity you weren’t there.
—I really should have gone with you but I _____ on some remaining problems.
| A．worked | B．was working | C．would work | D．would have worked |
He _________ to go through the hard times and finally became a famous artist.
| A．succeeded |
| B．managed |
| C．tried |
| D．enabled |
It is well known that biology is ______ science about living things.
| A．a |
| B．the |
| C．/ |
| D．an |
----May you _______ the experiment!
----Thank you very much.
| A．success in |
| B．succeed to do |
| C．succeed in doing |
| D．succeed doing |
---Never give up and you'll succeed.
---Thank you. i won't ______ you.
| A．hurt |
| B．fail |
| C．depend |
| D．harm |
All of the flowers now raised here have developed from those _______ in the forest.
| A．once they grew |
| B．they grew once |
| C．they once grew |
| D．once grew |