21. the street is full of traffic from morning ........... night A.in B.at C.on D.from 22.we will meet .......... six o'clock on Monday morning A.to B.at C.on D.from 23.she lived ............. America ............ 1969 A. in/in B.at/in C.on/at D.from/in 24.what is ...... TV today? A. to B. at C. on D.from 25.Marie Curie was born ............ Poland ............. 1867 A. at/in B. in/in C. on/at D. from/in 26.I'm interested in volleyball. I often play it .......... Sunday evening A.to B.at C.on D. from 27. he studied ............. Oxford University A.to B. at C. on D. from 28.he died .............. April 1st,2000 A. to B. at C. on D. from 29. she is always good ........... telling funny stories A. to B. at C. on D. from 30.this is ................ new classmate A. we B. us C. our D. ours