A.is | B.are | C.am |
A.is | B.am | C.are |
A.I am reading a book about China. | B.This is a book about China. |
A.What are you doing? | B.What are they doing? |
A.Where | B.What | C.Who |
A.这是我的弟弟。他在读书。 | B.这是我的朋友小强。他在照相。 |
A.at; on | B.on; in | C.at; in |
A.talking | B.talk | C.talks |
A.ride | B.riding | C.to ride |