----Why didn’t you see me wave to you then ? ----Oh, If so. I must say sorry. I think I____ in the other direction.
_A container weighs more after air is put in, ____proves that air has weight.
_)I had not believed in falling in love with somebody at first sight_______I met David on Valentine’s Day three years ago.
_—Did you visit the Summer Palace? —No.We could have, _______we spent too much time shopping. A.so B but C.ecause D.though
_______is often the case,he succeeded in this examination again.
_ _______broken,the glass can not hold water.