Tom never loses heart in face of difficulties,__ ,he always tries his best to overcome them.
| A．On the other hand | B．On the contrary |
| C．At the same time | D．As a result |
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 |
—What in the world put you in a really bad mood?
—________ in the traffic for hours.
| A．Stuck | B．Being stuck |
| C．To be stuck | D．sticking |
Most of the guests ________ to the wedding last week were his classmates and friends.
| A．having been invited | B．to be invited |
| C．being invited | D．invited |