Only by following this method .
| A．we can study English well |
| B．can we be able to study English well |
| C．can we study English well |
| D．study English well can we |
Every morning Jack's wife will stand before the mirror, ________ carefully until she has to go to work.
| A．dressed | B．dressing |
| C．to dress | D．having dressed |
________ for a whole night, we still couldn't agree on when to start and where to go for the holiday.
| A．Discussed | B．Having discussed |
| C．Discussing | D．Being discussed |
In my opinion, keeping dogs well ________ up is advisable for dog owners.
| A．to tie | B．being tied |
| C．tied | D．to be tied |
The old couple, ________ in the small village for years, can tell the names of all the villagers.
| A．living | B．lived |
| C．having lived | D．to have lived |
The gas price keeps rising, ________ an average of 7.7 yuan per liter this month.
| A．hit | B．to hit |
| C．hitting | D．hits |