It was difficult to guess his age.
Of course, it was difficult to guess what people in that closed country were thinking.
Such a feature of test design appeared to be effective, as it was found in *Qian and Schedl (2004) that learners interviewed all reported that it was difficult to guess, because the number of associates in each box of the DVK, which followed the format of *Read (1998), was not fixed.
Ben Westhoff of Las Vegas Weekly wrote that it was difficult to guess what inspired the development of the breakup ballad as Knowles married Jay-Z a few months before the album's release.
"And it's difficult to guess what people are thinking," says Pulido, "or the repercussions of us taking this long.
It is difficult to guess how well the relationships among these characters would have been ascertained without Mr. Barenboim's prologue.
In the long term, if the process of compromise does move forward, analysts said, it is difficult to guess at the future political shape of the country.
He has a fastball, a slider and a changeup, but throws all of them from the same arm angle and motion, so it is difficult to guess what is coming.
"At some point," Mr. Bernanke said, "health care spending as a share of gross domestic product will stop rising, but it is difficult to guess when that will be, and there is little sign of it yet".
Dr Yoshiki Sasai, who led the study at the RIKEN Centre for Developmental Biology in Kobe, Japan, said: "It is difficult to guess how long it will take, but we hope that we can produce human pituitary tissue in the next three years".
It's difficult to guess how this track will play as in both the Champions Trophy and in the County game this season we've seen a seemingly random pattern of high and low scores.
