In the following sentence, why ' challege' is the only answer? Why can't I use ' opportunity'?
Limited storage and cooking facilites, with no space or power to spare for complex food prepartion mean that the challenge for space nutritionists has gone beyond providing astronauts with food that is palatable and good for them
a. opportunity b. challege c. achievement d. ambition
Top answer
Because the lack of space is a problem for nutritionists.
— Mister Micawber
Because the lack of space is a problem for nutritionists.
Free · every Monday
Get the Weekly English Kit 📬
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.