“The biggest challenge is public trust.”
“It will challenge the scale of the entire campus.”
“The biggest challenge is the variability of the atmosphere.”
“The duty of youth is to challenge corruption.”
“It's a unique and challenging position.”
“This is a challenging time for big corporations.”
“It's a challenge to handle this material.”
“It's a great challenge for us.”
“"The duty of youth is to challenge corruption"”
“I've always loved a challenge.”