－Hi, I didn't know you had come back! Have you finished your teaching in America?
－Yes. I______Chinese there for more than two years.
| A．have been teaching | B．was teaching | C．taught | D．had taught |
Though he failed, he tried _______ it again and again.
| A．to do | B．doing | C．do | D．done. |
You didn't hear us come back last night. That's good. We tried ______ noisy.
| A．to not be | B．not to be | C．being not | D．not being |
Remember ______ the book, when you have finished it.
| A．putting back | B．having put back | C．to put back | D．will put back |
Some people's greatest pleasure is ______ .
| A．fishing | B．to fish | C．to be fish | D．being fishing |
. It's very kind ______ you ______ say so.
| A．of, to | B．for, to | C．to, to | D．of, / |