问题 填空题 根据图意用适当的词填空。1. The cat is _____________ the table. 2. The watermelon is _____________.3. The shoes are _____________.4. The T-shirt is _____________.5. The man is _____________ the horse. 答案 1. under 2. big 3. big 4. small / short 5. on
The cat is _____________ the table. 
The watermelon is _____________.
The shoes are _____________.
The T-shirt is _____________.
The man is _____________ the horse. 
信号起什么作用？