3. base n.______ vt__________base…on…___________ be based on…______________
(1) What do you base this theory on? _________________________________________
（2）The film _____ ______ _____the novel by Lu Xun. 这部影片以鲁迅的小说为基础。
4. present
(1) Mr Brown, here is a present for you. _________________________________________
(2) At present, he is on holiday. _____________________________________________
(3 ) They presented flowers to their teachers. _____________________________________
（4）The present situation is not disappointing. _____________ _______________________
(5) The people present at the meeting are all for me.
