A. swim because B doesn't make sense, neither does D. It could be A or C, but I'd pick A. I did this test before and I picked A, and got 80 % so good luck ;)
They all like the beach, but <em>none of them </em><em>swim</em> in the ocean. After none of + a plural word (none of the shops, none of them etc.) it's possible to use a <em>singular or plural verb</em>, but a <em>plural verb is more usual</em>. None of the shops were (or was) open. Also, none + of it's quite usual as a subject. B: past of swim is swam. C: past participle of swim is swum
I'd say the correct answer is B, because 'in the desert is part of the subject/noun 'canyon', and modifies it, that is, refers to it, describes it in more detail.
Cassius doesn't want Mark Antony to say anything because he doesn't trust him and he thinks Mark Antony will make matter worse and make them look bad but Brutus allows him to because he believes it will show people that they are not evil and that they did everything in the good interest of Rome.
