Can we start a sentence with who or whom? As far as I know, who and whom as relative pronouns, refer to the noun which comes exactly before them. I wonder if we can begin a sentence with them: Such a thing: "Who stole the money remains unknown. " Thank you

Present participle vs Past participle (in clause reduction) Which one is correct and why? Most students submit themselves to definite training for practical reasons, such as qualifying themselves for a trade or profession. ……………… from their angle, then, the study of the history of science will complete the training of scientific teachers, since to teach well requires a kind of perspective that can be obtained only by historical inquiries. 1) When it is looked 2) Looking at it Ignoring the odd, inacurate language of the text, which one is grammatically correct?

Is this sentence grammatically correct? Pewter is about eighty percent tin, which lead or antimony added for stiffness. This sentence is from TOEFL PBT test set. I think it is wrong and should change to: ......, to which lead or antimony is added for stiffness. Am I right?

I will bring the book with me/myself? Which one is correct? I will bring the book with me. or I will bring the book with myself. I think both are correct but the second one is more emphatic. Am I right?

Inversion with Neither ... nor ... In the below sentence, which is extracted from a book, the author uses "do" before subject: Neither do small back yards nor ornamental grass plots meet the needs of any but the very small children. However, I think when neither ... nor ... come between two nouns (subjects), there is no need to invert the sentence. For instance, Neither Mary nor her brothers are going out for dinner. (CORRECT) Neither is Mary nor her brothers are going out for dinner. (WRONG) I think the original sentence should change to Neither small back yards nor ornamental grass plots meet the needs of any but the very small children. Am I right?

Is this grammatically correct? Hot objects emit more infrared rays than do cold objects. This is the sentence: Hot objects emit more infrared rays than do cold objects. It is a question from old TOEFL test. I wonder why there is an inversion after "than". I think it should be revised as: Hot objects emit more infrared rays than cold objects do. or Hot objects emit more infrared rays than cold objects emit.This is the source: http://chinaenglish.com.cn/html/c107/2012-11/48995.html

"will" with time-clause (when-clause) I found such an example in Cambridge Dictionary: No one can predict when the disease will strike again. Is it correct or should it change to "No one can predict when the disease strikes again." Thank you

workshop participant or workshop's participant? !!NOT ANSWERED Why should we say "workshop participant" and when do we use " 's" to connect two words? I think here it is logical to say "workshop's participant" or "participant of the workshop", although in Oxford Dictionary "workshop participant" is written.

Which one is the best collocation of "effort" in this sentence? Which one do you prefer? invested or taken? and why is the other incorrect? Despite the effort "invested/taken", some questions remain unanswered. thank you.