1. Complete the zero conditional sentences with the correct form of the verbs in brackets.
1. If you ___________________ (burn) coal, it ___________________ (give) off greenhouse gases.
2. A rainbow often ___________________ (appear) if the sun ___________________ (come) out when it’s raining.
3. If an earthquake ___________________ (happen) under the ocean, it sometimes ___________________ (cause) a tsunami.
4. If a hurricane ___________________ (form) over the Indian Ocean, they ___________________ (call) it a typhoon.
5. Floods ___________________ (happen) if it ___________________ (rain) a lot more than usual for a long time.
Bài Làm:
| 1. burn, gives | 2. appears, comes | 3. happens, causes | 4. forms, call | 5. happen, rains |