Complete each of the following sentences in such a way that it means the same as the sentence printed before it

Complete each of the following sentences in such a way that it means the same as the sentence printed before it.
1. They have built two shopping malls this year.
=> Two shopping malls......................................................
2. Lan is not very tall, She can't do this job. 
=> If Lan.....................................................
 
3. Let's take an umbrella before going out.
=> How about.....................................................................?
 
Make meaningful sentences using the words given.
4. Ba asked me /if/I/know/how/to/drive/ a car.
=>.....................................................
 
5. I/know/him/since/I/be/primary student. 
=>.....................................................
 
6. It/be/necessary/protect/environment. 
=>.....................................................