________ tomorrow, I would take a bus to school.
| A．If it rains | B．If it was to rain |
| C．Should it rain | D．Rained it |
________twice a year，whether it is a car or a bus or a truck，is the rule that every driver must obey in this city.
| A．Examining |
| B．Examined |
| C．Being examined |
| D．Having been examined |
Yesterday a streetbeggar bought a lottery ticket purposelessly，________him a millionaire overnight.
| A．making | B．makes |
| C．to make | D．made |
Now that we’ve discussed our problem，are people happy with the decisions ________？
| A．taking | B．take |
| C．taken | D．to take |
He hurried to the station，only ________ that the train had left.
| A．to find | B．finding |
| C．found | D．to be found |
You should understand the traffic rule by now.You’ve had it ________ often enough.
| A．explaining | B．to explain |
| C．explain | D．explained |