21. I still seepinyinas ____ bridge between China and the rest of the world, ____ bridge between cultures.
A. a; the B. a; a C. the; a D. the; the
22. I should have to teach all subjects___ art, which he taught___.
A. except; it B. except; himself C. besides; it D. besides; himself
23. Obama had responded to Zhou’s suggestion ____ the US dollar was extraordinarily strong and that there was no need to create a new global reserve currency.
A. to say B. said C. having said D. saying