24．Last Monday，while the students on the playground watching the national flag
being raised，something unexpected ．
| A．were standing；arose | B．stood；was arising |
| C．had stood；had arisen | D．would stand；would arise |
Having been attacked by terrorists, _____.
| A．doctors came to their rescue |
| B．the tall building collapsed |
| C．an emergency measure was taken |
| D．warnings were given to tourists |
You can’t predict everything. Often things don’t _____ as you expect.
| A．run out | B．break out | C．put out | D．work out |
_____ the gate of the park, you’ll see a high tower on your left.
| A．Approaching | B．Approached | C．Closing | D．Closed |
Nurses in this hospital try their best to make patients feel at _____.
| A．pleasure | B．peace | C．comfort | D．Ease |
This is a very lovely doll. I’ll buy it _____.
| A．how much may it cost | B．no matter how it may cost |
| C．however much it may cost | D．how may it cost |