. The secretary worked late into the night, ___________ a long speech for the president.
| A．to prepare | B．preparing | C．prepared | D．was preparing |
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
—Look, it ____ again.
—Yeah. This is the third snow we ____ this spring.
| A．will snow; are having | B．has snowed; had had |
| C．is snowing; have had | D．snows; have had |
All attentionon the beautiful girl, the boy didn’t notice the teacher enter the classroom.
| A．focusing | B．focused | C．to focus | D．was focused |
Constant practice has erased my accent to a pointmany people think I’m a native speaker.
| A．which | B．what | C．where | D．when |
When he realized the police had seen him, the man ____ the exit as quickly as possible.
| A．made up | B．made for | C．made out | D．made off |