【題目】Lao She is most famous ____his play ____a writer.

【題目】After he graduated, Qian Xuesen became a researcher who studied rockets and missile (theory/ theories).

【題目】This is my ____________day to be here.

【題目】—_______ do you want to join? —The music club.

【題目】Yesterday my parents offered ____me to the Great Wall.

【題目】I often help him____the classroom.

【題目】Our world changed a lot in ____century.

【題目】It's a pity that his mother (去世)last year.

【題目】Can you ____the whole thing to the police?

【題目】—　　　does Jim get to school?