1 Things that usually or always happen →thường xuyên xảy ra

If my husband has a cold, I usually catch it.

2  Instructions in situations→lời hướng dẫn .chỉ dẫn,mệnh lệnh trong các tình huống

Ask Pete if you're not sure what to do.

3 Things that usually or always happen

If public transport is efficient, people stop using their cars.→hiệu quả nên họ sẽ sử dụng thay thế 

4 Instructions in situations

If you want to come, call me before 5:00. →lời chỉ dẫn

Choose the correct functions of these Zero conditional sentences. 
1 If my husband has a cold, I usually catch it. 
▢ Things that usually or always happen 
▢ Instructions in situations 
2 Ask Pete if you're not sure what to do. 
▢ Things that usually or always happen 
▢ Instructions in situations 
3 If public transport is efficient, people stop using their cars. 
▢ Things that usually or always happen 
▢ Instructions in situations 
4 If you want to come, call me before 5:00. 
▢ Things that usually or always happen 
▢ Instructions in situations