Many accidents ______ by careless drivers last year.
A: are caused
B: were caused
C: was caused
D: caused
A: are caused
B: were caused
C: was caused
D: caused
举一反三
- Many accidents____ by careless drivers last year. A: are caused B: were caused C: have caused D: will cause
- Many traffic accidents are caused by drivers who are under the weather. A: sick B: careless C: irresponsible D: drunk
- It is reported that many cases of sickness were caused by (eat) _________ during the Spring Festival this year.
- The unusually cold winter caused many plants to _______ late this year.
- It ______ last week that the haze (雾霾)in Beijing caused many problems.