Y a rien de mieux qu'une pastèque bien froide et sucrée les jours d'été. il y a rien de mieux qu’une tasse de café le matin. il y a rien de mieux qu’une tasse de thé chaud en hiver.

I have an appointment with A / THE doctor at two. Why is it wrong to use the article "a" in this sentence: "I have an appointment with A doctor at two." ? (The sentence is taken from the Oxford Practice Grammar test. And it marked "a" as a wrong answer.)

It doesn't do to try to "It doesn't do to try to...." What does this expression mean?

"took to the lecture circuit" What does the expression "took to the lecture circuit" mean in this sentence? In his final years of life, Hopkins took to the lecture circuit. Thank you!

Tyrannosaurus description "It closed its mouth in a death grin. It ran, its pelvic bones crushing aside trees and bushes, its taloned feet clawing damp earth, leaving prints six inches deep wherever it settled its weight." Where is the verb here? Why is it skipped? If I wrote this description I would have said: It ran, AS its pelvic bones WERE crushing aside trees and bushes, its taloned feet WERE clawing damp earth, WERE leaving prints six inches deep wherever it settled its weight." Thank you!:)

want going VS to go "A Tyrannosaurus Rex. The Tyrant Lizard, the most incredible monster in history. Sign this release. Anything happens to you, we're not responsible. Those dinosaurs are hungry." Eckels flushed angrily. "Trying to scare me!" "Frankly, yes. We don't want anyone going who'll panic at the first shot. Six Safari leaders were killed last year, and a dozen hunters... Would it be possible to say here : "want anyone to go" or that'd be grammatically incorrect? And if it's correct, what is the difference? Thank you!

"yet" in affirmative sentences I am trying to translate the song "Phantom of the Opera" ... Sing once again with me Our strange duet My power over you Grows stronger yet You'll give your love to me For love is blind The phantom of the opera is now Your mastermind ... Why do we use "yet" here? Would the meaning be different if we said "my power still grows over you"? Thank you

are going OR were going? If I had known that you are going to come by tomorrow, I would be in then. If I had known that you were going to come by tomorrow, I would be in then. If I had known that you are going to come yesterday, I would have been in then. If I had known that you were going to come yesterday, I would have been in then. Could you tell me, please which of these sentences are correct? Thank you!

IF vs SHOULD 1) If you have any problem, please contact me. vs Should you have any problem, please contact me. 2) If I finish my work in August, I will get a bonus! vs Should I finish my work in August, I will get a great bonus! Are the sentences correct? What tints of meaning does "should" add to the sentences? Thank you!