A:in search of
B:in place of
C:for lack of
D:for fear of
60×9=____
600+38=____
36÷4=____
90+420=____
325+475=____
98-15=____
72÷8=____
45÷9=____
16×7=____
0+15=____
150×0=____
92-9=____
320-207=____
129+350=____
200-170=____
400×5=____
900-750=____
7×700=____
3×222=____
5×9+6=____
22×6 ≈____
302×9 ≈____
298×3 ≈____
29×8 ≈____
508-397 ≈____
18+58= ____
59−29= ____
34+14= ____
1−56= ____
25+45= ____
—Can you teach me how to surf the Internet?
—Take this book. It will lead you _______ it well.
一艘轮船在小岛A的北偏东60°距小岛80海里的B处,沿正西方向航行2小时后到达小岛的北偏西45°的C处,则该船行驶的速度为____海里/小时.