向日葵菌核病是向日葵生产上危害严重的流行病害。
参考答案：错
读一读，选词填空。
1. It's time ____________ (to / for) go to school.
2. It's time ____________ (to / for) go home.
3. What time ____________ (is it / are they)?
4. I can see two ____________ (clock / clocks).
5. School is ____________ (over / ready).
驾驶人一边驾车，一边打手持电话是违法行为。
