You should ____ hard.
| A．studies | B．studying |
| C．study | D．Studys |
I like playing ______ pipa.
| A．a | B．an | C．the | D．/ |
—You won the first prize in the last Physics competition once again.
—___________. I made several mistakes.
| A．Congratulations | B．It doesn’t matter |
| C．Don’t mention it | D．You must be joking |
Much attention should be paid ____ the wild animals as many of them are dying out.
| A．to protecting | B．to protect | C．protecting | D．protect |
Poor thing! Jack a fall while he on the ice. He got hurt badly.
| A．was having; was skating | B．was having; skated |
| C．had; was skating | D．has had; was skating |