They were surrounded by the enemy, but they ________at last from the village.
| A．managed escaping | B．tried to escape |
| C．managed to escape | D．tried escaping |
They are considering______ they should do the experiment .
| A．weather | B．that | C．whether | D．what |
Lincoln, ______ President of ______ United States, was assasinated（暗杀）on April 14th , 1865 .
| A．the; / | B．/; the | C．the; the | D．/; / |
Why ______ a bad idea to ask Amy for advice?
| A．do you think | B．do you think is | C．is it | D．does it |
Which is ______ country, Canada or Australia?
| A．a large | B．a larger | C．the larger | D．larger |
I don't think the bottle's broken, ______?
| A．is it | B．hasn't it | C．has it | D．isn't it |