—Who called just now, Sam?—It’s Mona. She asked _____.
——“Good morning! ——“_________!”
Hello! What _______this?
--What's this _________English? --It's a clock. A.of B.on C.in
下面表示重量单位的是________________. A.NBA B.P C.kg
This is _________orange. That's_________pen. A.a ,a B. an;a C.a;an