—Look! There is beautiful rainbow in the sky.—Take the books for me, I’d like to take a photo of rainbow before it disappears.
The plane arrived at London airport ______ Wednesday.
What do you usually do ________ Christmas?
Mrs. Brown worded in the west of Australia ________ last summer.
The first class begins _______ 8 o’clock ______ the morning.
_______the past two months he has been busy with his school work.