Yes.
Yes, things are on hold is grammatically correct.
They do the test several times to check if it is right.
You must repet a exsperiment several times to make sure that your exsperiment is right.
You must repet a exsperiment several times to make sure that your exsperiment is right.
It is neither. Actually, it is: how old am I?
depends did some1 ask you
It harnesses advanced AI technology
yes
No,it is not grammatically correct.
"looking forward to your marriage" is correct.
i don't know just do anything hahah! =)
It's a slang version of agreement, such as "You sure are right!" Grammatically it would be "Sure, you are right". But pronounced, "Sho' you right!"