It puzzles the scientists _____ some mammals produce their young _____ others lay eggs．
| A．that; while | B．what; while | C．that; as | D．what; as |
The patient isn’t out of danger.He is _________ than he was yesterday.
| A．no better | B．worst | C．not worse | D．not more |
All men are created _________and we must enjoy _________right and chances in everything.
| A．fair;same | B．similarly;fair | C．equal;equal | D．fairly;equal |
We did not expect the plan we had made very carefully for them ______ so coldly.
| A．refused | B．to refuse | C．to be refused | D．refusing |
In order to make the separate family reunited，he did ______ them.（Which one of the following is wrong？）
| A．all he could to help | B．everything possible to help |
| C．his best to help | D．what he could help |
—Have you found out the telephone number I need？
—Yes，but ______，I have sit here for nearly a half hour.
| A．for finding it out | B．to find it out |
| C．for finding out it | D．to find out it |