We should turn to the right.

应该是往右。

Take the first turn to the right.

在第一个拐角处向右拐。

Turn to the right and go straight.

向右转，然后往前走。

Turn to the right at the second crossing.

在第二十字路口向右拐。

At the first stoplight, turn to the right.

在第一个红绿灯处往右拐。