Look at the three boxes________on the desk.要不要加一个be动词

Look at the three (box) on the desk Look at the three p_______ of my chassmates. thereare three example.look at them and find the letter for the question mark? There are three examples.Look at them and find out the letter for the question mark? Look at the three boxes________on the desk.要不要加一个be动词 Look at the three There are many green l______ on it. look at the （c ）.It's three ten填一个单词 Look At The Sky look at the boy. look at the Look at the picture Look at the 造句 look at the look at the chart look out at the look at the beach Look at the blackboard look at the