The students were excited when they knew they ______ out for a spring out the next month.
Amy ____ the school library. She ______ books three times a week.
—Could you tell us _______?—About five minutes.
Thank you for giving us some useful advice _______ how to deal _______ the problems.
Things made of plastic are usually _______, but they are _______ to get polluted.
All the club members _______ the floor when they heard someone _______ for help.