When you are making a left turn from a two-way street onto a two-way street, what should you do?

Answer: A — Yield the right-of-way to vehicles on the street you are entering.

When making a left turn from a two-way street onto another two-way street, it is important to yield the right-of-way to any vehicles on the street you are entering. This means that you should wait for a clear gap in traffic before making your turn. Option B is incorrect because it refers to oncoming traffic in general, but it's specifically important to yield to vehicles on the street you are entering. Option C is incorrect because it suggests pulling into the left lane, but you should always make a left turn from the left-most lane. Option D is incorrect because it encourages quick and aggressive driving, which is unsafe and may cause a collision.