中国大学MOOC: The missing boy was last seen in the playground.
举一反三
- The missing boy was last seen in the playground.
- The ______________ boy was last seen _____________ near the lake. A: missing; playing B: missing; play C: missed; played D: missed; to play
- 中国大学MOOC: The boys were seen _____________ football on the playground.
- The ______ boy was last seen ______ near the lake.
- The missing boys were last seen ________ near the bank.