See the flag on top of the building ? That was ___ we did this morning .A when B. which C. where D. what
Hi, Bob. How are you doing? It has been a long time _____ we left our junior middle school.
I really appreciate_____ to help me, but I am sure that I can manage by myself.
Life in the city is quite different from _____ in the countyside.
---- How about your last weekend? ---- It was boring. I______ anything.
This book is said to be a special one, which______ many events that cannot be found in other history books.