a bolt from the blue 晴天霹雳; O8 B# X' V$ ^7 J2 S. N: Y% _
a piece of cake 轻而易举 7 I& O4 e& h2 ]+ Nabove board 光明正大 * F& W3 E9 r6 j& p4 `against the clock 分秒必争, v1 w+ D2 h5 l/ v5 R
all thumbs 笨手笨脚 6 U0 @7 M) e ?; b- r ]6 Eall wet 大错特错( H; R5 g# n, u; T5 A* ]+ A, _
ants in sb.'s pants 坐立不安; i' o1 c5 m7 c$ r; W; V
apple-pie order 井然有序