The film star wears sunglasses. Therefore, he can go shopping without ______..
| A．recognizing | B．being recognized |
| C．having recognized | D．having been recognized |
---- My baby has a heart trouble. ---- Did the doctor find it difficult ______ ?
| A．in treating | B．treating | C．for treating | D．to treat |
---- Where did he go? ---- He went to another store ______.
| A．to buy pencils | B．for buying pencils | C．buy pencils | D．buying pencils |
---- Why was the official meeting called? ---- ______ new officers.
| A．Select | B．Selecting | C．To select | D．For selecting |
Because of air pollution being greatly reduced, this city is still ______.
| A．a good place which to be lived in | B．lived as a good place |
| C．a good place to live in | D．living in as a good place |
---- I didn't hear you come in last night. ---- That's good. We tried_____ noisy.
| A．not be | B．not to be | C．to be not | D．to not be |