Hello,<br/><br/>Could someone please comment on the below sentences? Which (one) of them are (is) least informal?<br/><br/>1. The computer science needs more women, but it's not that there haven't been some already.<br/><br/>2. The computer science needs more women, but it's not as there haven't been some already.<br/><br/>3. The computer science needs more women, but it's not like there haven't been some already.<br/><br/>Mny thanks for any help!<br/><br/>Lenka