11.Bob doesn't look his age.I think he's somewhere＿＿。

• A、in forty
• B、in forties
• C、in his forty
• D、in his forties

(58)___

15.At such a time of crisis, we must try ＿＿ to all differences and stick together,

• A、set aside 

• B、set back

• C、set down

• D、set forth