The young man used to _______ to work, but he is used to _______ to work now.
A:drive; walking
B:drove; walked
C:drive; walks
D:driving; walk
如果3 5是3和5的倍数,那么横线上可能是( )。
32÷4=____
6×4=____
40-8=____
24÷8=____
30÷5=____
7×5=____
28÷7=____
21÷3=____
计算:3tan30°+2cos45°-2sin60°.