| A．work | B．help | C．food |
（ ）| A．Bill can’t ride a bike. It’s difficult. |
| B．Bill can ride a bike. It’s easy. |
（ ）| A．Jill hurts her head. Jack hurts his arm. |
| B．Jill hurts her head, but Jack is okay. |
A．How old  | B．How much | C．How long |
| A．is | B．are | C．do |
| A．is | B．be | C．/ |
| A．run | B．runing | C．running | D．runs |
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