Mr Smith likes traveling _______ ; but his wife enjoy _______ .
| A．by train; taking a taxi | B．on train; by taxi |
| C．by train; by taxi | D．on train; taking a taxi |
He is really an excellent doctor and he is _____ to becoming an expert in this field.
| A．in a way | B．by the way |
| C．on the way | D．under the way |
He is such a strong-willed person that there is nothing in the world that can _____ him.
| A．win | B．defeat |
| C．rescue | D．attack |
Come and see me whenever ____.
| A．you are convenient |
| B．you will be convenient |
| C．it is convenient for you |
| D．it will be convenient for you |
As we can see, the prices of vegetables _____ according to the season.
| A．vary | B．fall | C．rise | D．reject |
I felt very tired when I got home. and I _______ straight to bed.
| A．go | B．went |
| C．had gone | D．have gone |