________ he works hard, I don't mind when he finishes the experiment.
| A．As soon as | B．As well as |
| C．So far as | D．So long as |
The doctor suggested he ______.
| A．not smoke | B．don’ t smoke | C．doesn’t smoke | D．no smoke |
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 |