Question

4. Professor Gee usually had us        before the class was over (hand) 

Gee教授通常让我们在下课之前交上我们的作文。

Answer 1

4. hand in our compositions/writings hand in为固定搭配，意为"上交"，相当于turn in。不定式作动词have sb.的补足语时,其符号to应省略。