—Did you find your lost key?—No, but I think ________ must have picked it up.
He had ________ money, so he asked his mother for some.
– When did the terrible earthquake in Wenchuan happen? -- It happened _________ the afternoon of May 12, 2008.
Boys, don’t touch the machine, or you may hurt _________.
Mrs. Green usually goes shopping with _____ umbrella in ______ summer.
There ________ a basketball match between Class 1 and Class 2 yesterday.