_______ has been known that ______ other waste found in the ocean, the plastic does not break down.
—Hi, Susan, where were you at lunch time?I ________ a seat for you in the coffee shop. —Oh, sorry to miss you.My political science class ran longer than usual.
—Mum, you should have taken me to the park this morning. —I had planned to, but I couldn't afford the time.I ________ a lecture.
—When did the computer crash? —This morning,while I ________ the reading materials downloaded from some websites.(2012·福建)
After school we went to the readingroom to do some reading,only to be told that it ________.(2012·安徽)
—Joan,what ________ in your hand? —Look!It's a birthday gift for my grandma.