那位自行车骑手在转入小巷前示意左转。

The cyclist ___signalled left before turning onto the side street.

山上的卫兵用红旗示意，以警告下面的部队。

The guard on the hill was ___signalling with a red flag to warn the troops below.

她微妙地向桌子对面的同事示意，该结束会议了。

She subtly ___signalled to her colleague across the table that it was time to end the meeting.