We _ for a picnic if it _ rain this Sunday.
| A．go, doesn't | B．will go, won't |
| C．will go, doesn't | D．go, won't |
After a long walk，he was tired and had to stop________a rest．
| A．to have | B．have | C．to having | D．having |
—What happened________him？
—He had an accident．
| A．with | B．to | C．of | D．about |
—What did you see？
—I saw some boys________on the playground when I walked past．
| A．sat | B．sitting | C．to sit | D．to sitting |
—________？
—She has a sore back．
| A．What is she |
| B．What does she look like |
| C．What’s the matter with her |
| D．What does she do |
They study so________that they easily pass the exam．
| A．hard |
| B．harder |
| C．hardly |
| D．hardest |