At present juncture
however, the supercomputer
would be a costly toy
No error
Answer is Right!
Answer is Wrong!
The correct answer is: D. No error
The sentence is grammatically correct. The word “however” is used to introduce a contrast or qualification. In this case, it is used to contrast the present situation with a possible future situation. The word “supercomputer” is a noun that refers to a very powerful computer. The word “would be” is a modal verb that is used to express possibility or probability. The word “a costly toy” is a noun phrase that refers to something that is expensive but not very useful.
The sentence is well-structured and easy to understand. The words are used correctly and in the right order. The sentence does not contain any errors in grammar, spelling, or punctuation.