<p>If you do stay in civil engineering (or any engineering), you really do want to take a science your first semester to avoid being behind and graduating late.</p>
<p>If you do business, then either Physics 7A or Chemistry 1A/1AL or 4A will fulfill the physical science requirement in the 7-course breadth (not needed if you do CS, since CS 61C also fulfills it, but L&S CS majors interested in patent law may need to take Physics 7A-7B or Chemistry 1A/1AL-1B or 4A-4B due to course requirements for the patent exam).</p>