—What are you doing, Bob?
—I __________ a Chinese song.
| A．learn | B．learning |
| C．am learning | D．am learn |
The man tells us that the best time _____ Beijing is in autumn.
| A．to visit | B．visiting |
| C．visited | D．to be visiting |
____tall trees they are!
| A．How | B．What | C．How a | D．What |
The old man _____ under a big tree is holding a _____ pole in his hand.
| A．sits; fish | B．sit; fishing |
| C．sat; fish | D．sitting; fishing |
---How do you learn English words ?
---______ making flashcards.
| A．TO | B．By | C．For | D．With |
Do you know the man _____ is sitting behind Nancy ?
| A．what | B．which | C．who | D．whom |