Complete the sentence by writing the correct signal words or phrases for cause
and effect. Choose the most appropriate answer from the box.

therefore so to that effect
for the reason because

1. Plastic bags are non-biodegradable materials. __________ we must learn to
dispose them properly.
2. Health is wealth __________ we must take good care of our body.
3. Accidents can happen anywhere __________ it is important to practice safety
all the time.
4. Organic fertilizer should be preferred rather than artificial one _________ that it
does not make the soil barren.
5. We must learn to conserve water _________ it is very precious.